38 results on '"Lactacidemia"'
Search Results
2. Effects of myocardial infarction and an intensive exercise bout on kinetic of lactate, and LDH-B levels in spontaneously hypertensive rats
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Rafael Aguiar Marschner, Jocelito Bijoldo Martins, Melissa Medeiros Markoski, Alexandre Machado Lehnen, and Maximiliano Isoppo Schaun
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lactate dehydrogenase ,acute myocardial infarction ,bioenergetics ,lactacidemia ,intense exercise bout ,rats ,Sports ,GV557-1198.995 ,Sports medicine ,RC1200-1245 - Abstract
Abstract Aims: This study aimed to evaluate the kinetics of lactate and lactate dehydrogenase B (LDH-B) protein levels as well as the maximum effort capacity of spontaneously hypertensive rats (SHRs) with experimental acute myocardial infarction (AMI). Methods: thirty-two SHRs were divided into (n=8/group): S (sham), SE (sham+exercise), I (AMI), and IE (AMI+exercise). A maximum exercise test (treadmill) was evaluated before AMI or sham surgery. Echocardiography was performed 48h after the surgery. Lactacidemia was assessed at rest and during an intense exercise bout (48h after echocardiography). A two-way ANOVA followed by the post-hoc (Bonferroni) test was used, p
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- 2020
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3. Evaluación de algunas variables fisiológicas en caninos sometidos a esterilización quirúrgica / Assessment of some physiological variables in canines subjected to surgical sterilization
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Emilio Faro, Federico Meincke, Carlos Blanco, and Jorge Guillermo Cuatrin
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caninos ,esterilización quirúrgica ,temperatura corporal ,glucemia ,lactacidemia ,Veterinary medicine ,SF600-1100 - Abstract
En el presente trabajo se estudió la posible asociación entre la temperatura corporal, glucemia y lactacidemia con el acto quirúrgico de esterilización de caninos machos y hembras. Estos parámetros fueron elegidos ya que se sabe que sufren modificaciones ante eventos estresantes(1) y es de esperar que dichos cambios se produzcan como consecuencia del acto quirúrgico. Se estudiaron las variables de interés en tres tiempos a lo largo del proceso quirúrgico en caninos macho y hembra. Los resultados demostraron disminuciones significativas del lactato y la temperatura rectal y un aumento significativo de la glucemia
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- 2018
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4. O efeito da alternância nos exercícios de grande e pequenos grupamentos em membros inferiores sobre a lactacidemia e parâmetros cardiovasculares
- Author
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Giovani Veira da Costa, José Campanholi Neto, Autran José Silva Júnior, and Vilmar Baldissera
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exercícios resistidos ,lactacidemia ,omni ,parâmetros cardiovasculares ,Sports medicine ,RC1200-1245 - Abstract
O objetivo do presente estudo foi verificar a influência na alternância na ordem de execução de exercícios para membros inferiores: Agachamento Livre (AGL) e cadeira extensora (CE) sobre a lactacidemia, escala de percepção de esforço de OMNI e parâmetros cardiovasculares. 10 voluntários, 27,3±1,7anos; 177,3±2,4cm; 87,5 ± 4,1kg realizaram duas sequencias de 3 séries de 10 repetições a 70% 1RM de agachamento livre (AGL) e cadeira extensora (CE) alternando os exercícios. A 1a sequência AGL e CE e a 2a sequencia CE e AGL. Foram aferidas em repouso e ao final de cada série: lactacidemia, percepção subjetiva de esforço por OMNI, frequência cardíaca, pressão arterial sistólica, pressão arterial diastólica e duplo produto. Todos os parâmetros estudados apresentaram significativas elevações na 2a sequencia quando comparado a 1a sequência. Concluímos, portanto que a realização de uma sequência de exercício resistido iniciando com recrutamento de pequenos grupamentos musculares anterior a grandes grupamentos induz em significativo estresse sobre o sistema metabólico (lactacidemia), esforço percebido (escala de percepção de esforço de OMNI) e sistema cardiovascular (FC, PAS, PAD e DP). Assim sendo, a normativa do American College of Sports Medicine que sugere treinamento de grandes grupamentos anterior a pequenos seja adequada, podemos sugerir que a alternância acarretaria um estresse, sobrecarga e fadiga maiores, talvez seja o objetivo de alguns programas de treinamento resistido com o intuito de hipertrofia muscular. ABSTRACT The effect of alternation in the exercises of large and small groupings in lower limbs on lactacidemia and cardiovascular parameters The aim of this study was to investigate the influence of alternating the exercises execution order for legs: Squat Free (AGL) and extensor chair (EC) on the lactacidemia, perception scale of OMNI effort and cardiovascular parameters. 10 volunteers 27.3 ± 1.7 anos; 177.3 ± 2.4cm; 87.5 ± 4.1kg were two sequences of 3 sets of 10 repetitions at 70% 1RM squat free (SF) and leg extension (LE) alternating exercises. The first sequence SF and EC and the second sequence LE and SF. They were measured at rest and after each series: lactacidemia, perceived exertion by OMNI, heart rate, systolic blood pressure, diastolic blood pressure and double product. All parameters studied showed significant increases in the second sequence when compared to the first sequence. We therefore conclude that performing a sequence resistance exercise starting with recruitment of small anterior muscle groups to large groups induces a significant stress on the metabolic system (lactacidemia), perceived exertion (scale of perceived OMNI effort) and cardiovascular system ( HR, SBP, DBP and DP). Therefore, the rules of the American College of Sports Medicine suggests training large previous groups small is adequate, we suggest that the alternation would have carried a stress overload and increased fatigue, it may be the objective of some resistance training programs in order muscle hypertrophy.
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- 2017
5. Semnificaţia clinico-diagnostică a nivelului lactacidemiei în colica la cabaline.
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Duțulescu, Valentin Alexandru, Roșca, Maria, and Codreanu, Mario Darius
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BLOOD lactate , *COLIC , *HORSES , *PATHOLOGY , *SYNDROMES - Abstract
In horse pathology, colic syndrome, through its etiopathogenetic complexity, diversity of clinical expression and incidence, is a dominant one, whose research of inductive, clinical-evolutionary aspects and paraclinical changes requires a concentrated multidisciplinary and correlatively-analytically evaluated approach, in order to optimize the success of its therapy. The aim of this study is to evaluate the level of blood lactic acid in patients and its use as a diagnostic tool in terms of clinical evolution. [ABSTRACT FROM AUTHOR]
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- 2021
6. Oculo-auriculo-vertebral spectrum associated to progressive external ophthalmoplegia. Biological, laboratory, electrophysiological and clinical aspects
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Agostino Berio, Giacomo Garlaschi, Gian Luigi Mariottini, Enrico Calcagno, and Attilia Piazzi
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Oculo-Auriculo-Vertebral Spectrum ,Lactacidemia ,Pyruvicemia ,Lactate to Pyruvate ratio ,Malformation ,Progressive external ophthalmoplegia. ,Biology (General) ,QH301-705.5 - Abstract
The authors discuss about the relationships between oculoauriculo- vertebral spectrum (OAVS), a malformative condition affecting eyes, ears and vertebral structures mainly derived from neural crests, and autosomal dominant progressive external ophthalmoplegia (adPEO) – an electron transport chain disorder characterized by palpebral ptosis and muscular symptoms – on the basis of laboratory data and clinical signs in a case belonging to a family in which symptoms of both diseases occur. Hemifacial microsomia and ears abnormalities were the main neural crest cells (NCC) derived signs for OAVS diagnosis. Palpebral ptosis and the associated hyperlactacidemia with high Lactate to Pyruvate ratio were main signs for the suspicion of adPEO, but the diagnosis was proposed by clinical, biochemical, electrophysiological and genetic methods because the biopsy not always is diagnostic, as in our case. The association of two groups of symptoms (malformed, NCCrelated, and myopatic-electron transport related) in the same subject as observed in our case and partially in the family, may be ascribed to nuclear abnormalities and mitochondrial electron transport disorder, respectively, as well as to a possible common etiopathogenetic mechanism. In some cases of OAVS, the malformations may be consequent to oxidative phosphorilation disease (OXPHOS) derangement, as previously demonstrated; the extensive determination of lactacidemia may be important to address the research on OAVS patients in the mitochondrial/OXPHOS genetic domain, with advantage in the knowledge of OAVS pathogenesis.
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- 2018
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7. Oculo-auriculo-vertebral spectrum associated to progressive external ophthalmoplegia. Biological, laboratory, electrophysiological and clinical aspects.
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Berio, Agostino, Garlaschi, Giacomo, Mariottini, Gian Luigi, Calcagno, Enrico, and Piazzi, Attilia
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OPHTHALMOLOGY , *ELECTROPHYSIOLOGY , *EAR abnormalities , *PYRUVATES , *GENETICS - Abstract
The authors discuss about the relationships between oculoauriculo- vertebral spectrum (OAVS), a malformative condition affecting eyes, ears and vertebral structures mainly derived from neural crests, and autosomal dominant progressive external ophthalmoplegia (adPEO) - an electron transport chain disorder characterized by palpebral ptosis and muscular symptoms - on the basis of laboratory data and clinical signs in a case belonging to a family in which symptoms of both diseases occur. Hemifacial microsomia and ears abnormalities were the main neural crest cells (NCC) derived signs for OAVS diagnosis. Palpebral ptosis and the associated hyperlactacidemia with high Lactate to Pyruvate ratio were main signs for the suspicion of adPEO, but the diagnosis was proposed by clinical, biochemical, electrophysiological and genetic methods because the biopsy not always is diagnostic, as in our case. The association of two groups of symptoms (malformed, NCCrelated, and myopatic-electron transport related) in the same subject as observed in our case and partially in the family, may be ascribed to nuclear abnormalities and mitochondrial electron transport disorder, respectively, as well as to a possible common etiopathogenetic mechanism. In some cases of OAVS, the malformations may be consequent to oxidative phosphorilation disease (OXPHOS) derangement, as previously demonstrated; the extensive determination of lactacidemia may be important to address the research on OAVS patients in the mitochondrial/OXPHOS genetic domain, with advantage in the knowledge of OAVS pathogenesis. [ABSTRACT FROM AUTHOR]
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- 2018
- Full Text
- View/download PDF
8. Evaluación de algunas variables fisiológicas en caninos sometidos a esterilización quirúrgica.
- Author
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Faro, E., Meincke, F., Blanco, C., and Cuatrin, J.
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CANIDAE , *STERILIZATION (Disinfection) , *SURGICAL complications , *BLOOD sugar , *LACTATES - Abstract
In the present paper the possible association between body temperature, glycemia and lacticaemia with the surgical act of sterilization of male and female canines is studied. These variables were chosen since they are known to be modified in the face of stressful events. It is expect d to observed changes in metabolic substrates used by the patient during surgery. The variables of interest were studied in three times (pre and intra-surgical) in male and female canines. Significant decreases in lactate and rectal temperature and a significant increase in blood glucose were detected. [ABSTRACT FROM AUTHOR]
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- 2017
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9. Influence of the selection from incremental stages on lactate minimum intensity: a pilot study
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Willian Eiji Miyagi, Jorge Vieira de Mello Leite, and Alessandro Moura Zagatto
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Aerobic capacity ,Lactate-intensity relationship ,Lactatemia ,Mathematical ,Capacidade Aeróbia ,Relação lactato-intensidade ,Lactacidemia ,Modelo matemático ,Sports ,GV557-1198.995 ,Medicine (General) ,R5-920 - Abstract
The purposes of this study were to assess the influence of stage selection from the incremental phase and the use of peak lactate after hyperlactatemia induction on the determination of the lactate minimum intensity (iLACmin). Twelve moderately active university students (23±5 years, 78.3±14.1 kg, 175.3±5.1 cm) performed a maximal incremental test to determine the respiratory compensation point (RCP) (initial intensity at 70 W and increments of 17.5 W every 2 minutes) and a lactate minimum test (induction with the Wingate test, the incremental test started at 30 W below RCP with increments of 10 W every 3 minutes) on a cycle ergometer. The iLACmin was determined using second order polynomial adjustment applying five exercise stage selection: 1) using all stages (iLACmin P); 2) using all stages below and two stages above iLACminP (iLACminA); 3) using two stages below and all stages above iLACminP (iLACminB); 4) using the largest and same possible number of stages below and above the iLACminP (iLACminI); 5) using all stages and peak lactate after hyperlactatemia induction (iLACminD). No differences were found between the iLACminP (138.2±30.2 W), iLACminA (139.1±29.1 W), iLACminB (135.3±14.2 W), iLACminI (138.6±20.5 W) and iLACmiD (136.7±28.5 W) protocols, and a high level of agreement between these intensities and iLACminP was observed. Oxygen uptake, heart rate, rating of perceived exertion and lactate corresponding to these intensities was not different and was strongly correlated. However, the iLACminB presented the lowest success rate (66.7%). In conclusion, stage selection did not influence the determination of iLACmin but modified the success rate
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- 2013
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10. Evaluación del grado de acuerdo entre dos kits para determinación de lactacidemia en pacientes de una Unidad de Cuidados Intensivos.
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Abrego, M. F., Barbosa, L. A., Bergara, M. B., Farías, R., Labriola, M. del H., Monzón, J., Salcedo, C., and Walz, M. F.
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- 2014
11. Influence of the selection from incremental stages on lactate minimum intensity: a pilot study.
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Eiji Miyagi, Willian, de Mello Leite, Jorge Vieira, and Moura Zagatto, Alessandro
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ANALYSIS of variance ,BLOOD gases analysis ,COLLEGE students ,CONFIDENCE intervals ,STATISTICAL correlation ,EXERCISE physiology ,LACTATES ,MATHEMATICS ,PILOT projects ,EFFECT sizes (Statistics) ,AEROBIC capacity ,ANAEROBIC threshold ,OXYGEN consumption ,ERGOMETRY ,LACTIC acidosis ,DESCRIPTIVE statistics - Abstract
Copyright of Brazilian Journal of Kineanthropometry & Human Performance is the property of Brazilian Journal of Kineanthropometry & Human Performance and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2013
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12. Limiar de lactato em exercicio resistido em idosos.
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Sousa, N. F., Souza, M. C., Pereira, G. B., Bertucci, D. R., Magosso, R. F., Baldissera, V., and Andrade, S. P.
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ANTHROPOMETRY , *CARDIOPULMONARY system , *COMPARATIVE studies , *EXERCISE , *EXERCISE physiology , *EXERCISE tests , *HEART rate monitoring , *LACTATES , *MUSCLE strength , *MUSCLE strength testing , *ANAEROBIC threshold , *EXERCISE intensity , *DESCRIPTIVE statistics - Abstract
The presence of anaerobic threshold (AT) in resistance exercise has been studied in recent years. The aim of this study was to identify and to compare the AT in elderly population during leg press (LP) and bench press (BP). Fourteen elderly men (68.9 ± 4.0 years, 170.5 ± 0.05 cm e 76.1 ± 7.8 kg) performed two maximal incremental tests based on percentages of one repetition maximum (1RM) for the determination of AT during LP and BP. Blood lactate, heart rate (HR) and rating of perceived exertion (RPE) were measured at the final of each stage and it were compared between the exercises at the intensity of the AT. The level of significance was p ≤ .05. The AT in the LP was 27.9 ± 5.0% of 1RM and in the BP was 21.5 ± 3.1% of 1RM, with statistical differences between the exercises. However, blood lactate was significantly lower on LP (1.36 ± 0.40 mmol.L-1) when compared with BP (1.92 ± 0.38 mmol.L-1). Although the intensity of AT has been different between the exercises, HR and RPE did not presented statistical significant differences. It was possible to identify the AT on elderly population during LP and BP exercises and it occurred in lower intensities for BP. [ABSTRACT FROM AUTHOR]
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- 2013
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13. Omega-3 polyunsaturated fatty acid enriched diet attenuates stress-induced lactacidemia in 10-day-old rats.
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Goto, Masakatsu, Skalski, Miroslow, Ravindranath, Thyyar, Myers, Thomas, and Zeller, W Patrick
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SEPTIC shock , *UNSATURATED fatty acids in human nutrition , *METABOLISM in newborns - Abstract
Abstract Background: Lactacidemia is often seen under stress conditions including septic shock in the newborn. Under stress conditions, plasma catecholamine concentrations are increased and play an important role in lactate metabolism. Our previous study shows that perinatal feeding of omega-3 polyunsaturated fatty acid enriched diet (ω-3PUFA) attenuates lactacidemia of endotoxic shock in 10-day-old rats. In the omega-6 fatty acids series, decosapentanoic acid, two series prostaglandins and four series leukotrienes are synthesized through linoleic acids. As plasma lactate concentration correlates with the outcome of septic shock in the newborn, it is important to understand the effects of ω-3PUFA on lactate metabolism. Thus, we tested the hypothesis that perinatal feeding of omega-3 polyunsaturated fatty acid enriched diet (ω-3PUFA) alters responses to catecholamines and attenuates the stress-induced lactacidemia in 10-day-old rats. Methods: Ten-day-old rats which perinatally fed ω-3PUFA. Lactacidemia was induced by swimming for 5 min. Ten-day-old rats which perinatally fed ω-6PUFA were controls. Omega-6 fatty acids series are contained in animal fats and corn oil. Adrenergic blockers were used to assess roles of catecholamines in swimming-induced lactacidemia. Results: Swimming increased plasma lactate concentration less (P<0.05) in rats fed ω-3PUFA than rats fed ω-6PUFA. Swimming increased plasma concentrations of glucose and glucagon, cyclic adenosine monophosphate (cAMP) concentration and phosphoenolypruvate carboxykinase mRNA in the liver, and cAMP concentration in the hindlimb muscle more (P<0.05) in rats fed ω-3PUFA than in rats fed ω-6PUFA. Phentolamine and propranolol enhanced swim-induced lactacidemia in the ω-3PUFA group, while they decreased the lactacidemia in the ω-6PUFA group. Propranolol enhanced swimming-induced hyperglycemia in the ω-6PUFA group more than in the ω-3PUFA group. Conclusions: ω-3PUFA might increase β-adrenergic response in the liver and increase gluconeogenesis in response to stress, resulting in decreased lactacidemia. [ABSTRACT FROM AUTHOR]
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- 2001
14. Effects of time under load on psychobiological stress, energy expenditure and lipolysis in resistance exercise sessions performed at the intensity 70% 1RM
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Campanholi Neto, José, Universidade Estadual Paulista (Unesp), and Baldissera, Vilmar [UNESP]
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Blood lactate concentration ,Glycerol ,Lactacidemia ,Training impulse ,Glicerol ,Oxygen consumption ,Consumo de oxigênio ,Impulso de treinamento - Abstract
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No. of bitstreams: 1 campanholi-neto_j_dr_rcla.pdf: 2877503 bytes, checksum: 3971414678a4538378970cb816c822e4 (MD5) Previous issue date: 2019-06-14 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) A organização das variáveis do exercício resistido altera respostas do estresse psicobiológico, da demanda energética, predominância do substrato energético utilizado durante a prática do exercício e também de lipólise. Desta maneira é fundamental estudar os efeitos das variáveis do exercício resistido sobre as respostas citadas. Os estudos sobre as respostas ao estresse provocado pelo exercício resistido estão voltados, principalmente, para o volume e intensidade. Outra variável pode influenciar sobre estas respostas, a duração da carga. Assim os objetivos deste estudo são: a) Verificar a influência da duração da carga sobre o estresse psicobiológico; b) Avaliar as respostas da demanda energética a diferente duração de carga; c) Determinar o substrato energético predominante durante a execução dos protocolos; d) Investigar o efeito da duração da carga sobre a lipólise. Participaram da pesquisa 16 voluntários do sexo masculino com mais de três meses de pratica em musculação, portanto familiarizados com os exercícios convencionais de academias propostos neste trabalho, com idade média de 29,31 ± 5,26 anos, saudáveis, sem diagnósticos de doenças que impossibilitem a prática de atividade física. Os participantes visitaram o laboratório em cinco ocasiões: na primeira assinaram o TCLE, ocorreu a aplicação do PAR-Q e teste de 1RM em todos exercícios que constituem as sessões. Na segunda visita foi realizada a familiarização com os procedimentos experimentais. Na terceira e quarta visita, realizadas aleatoriamente, foram submetidos aos protocolos (A) três séries de 10 repetições, com intervalo de dois minutos, a 70% de 1RM e (B) seis séries de cinco repetições, com intervalos de um minuto, a 70% de 1RM. Na quinta e última visita foram realizados os testes para a caracterização da amostra. Para atingir os objetivos deste trabalho os parâmetros avaliados foram: impulso de treinamento (TRIMP), demanda energética, quociente respiratório e concentração de glicerol. O TRIMP em unidades arbitrárias (UA): 413,95 ± 82,23 no protocolo A e 330,10 ± 75,21 no protocolo B (P = 0,0003). Demanda energética total: A: 302,0 ± 46,1 kcal e B: 310,6 ± 55,3 kcal (P = 0,4198). Quociente Respiratório: A: 1,16 ± 0,07 e B: 1,00 ± 0,05(P < 0,0001). Houve um efeito significativo na forma em que os protocolos são organizados sobre a concentração de Glicerol F(1, 30) = 19,71, P = 0,0001, r = 0,98. Os momentos de coleta (Pré, R2, R15 e R30) também apresentaram efeito significativo sobre a concentração de Glicerol F(3, 90) = 61,79, P < 0,0001. Os dados permitem concluir que o protocolo A (3 x 10) provocou maior mobilização de glicerol, portanto maior lipólise e maior estresse psicobiológico, porém sem diferença estatística significativa na demanda energética em comparação ao protocolo B (6 x 5). Do ponto de vista prático é uma ótima estratégia utilizar sessões com menor duração da carga, como no protocolo B (6 x 5), para proporcionar gasto calórico similar, com menor desconforto e ainda proporcionar lipólise. The organization of the variables of the resistance exercise changes the responses of psychobiological stress, energy expenditure, predominance of the energy substrate used during exercise and lipolysis. In this way it is fundamental to study the effects of the variables of the resistance exercise on the cited answers. Studies on the responses to stress caused by resistance exercise are mainly focused on volume and intensity. Another variable can influence on these responses is the time under load. Thus the purpose of this study was: a) To verify the influence of the time under load on the psychobiological stress; b) Evaluate the responses of the energy expenditure to different time under load; c) Determine the predominant energy substrate during the execution of the protocols; d) Investigate the effect of the time under load on lipolysis. Sixteen male subjects with more than three months of practice in bodybuilding participated in the study, so they were familiar with the conventional exercises of academies proposed in this project, with a mean age of 29.31 ± 5.26 years, healthy, without diagnoses of diseases that make it impossible the practice of physical activity. The subjects visited the laboratory on five occasions: the first one signed the informed consent, the application of the PAR-Q and the 1RM test occurred in all exercises that constitute the sessions. During the second visit, familiarization with the experimental procedures was performed. In the third and fourth visit, at random, protocols (A) were submitted to three sets of 10 repetitions, with two minute interval, at 70% 1RM and (B) six sets of five repetitions, with one minute intervals, at 70% of 1RM. On the fifth and final visit, the tests were carried out to characterize the sample. In order to reach the objectives of this project the parameters evaluated were: TRIMP, energy expenditure, respiratory exchange ratio (RER) and glycerol concentration. The TRIMP in arbitrary units (AU): 413.95 ± 82.23 in protocol A and 330.10 ± 75.21 in protocol B (P = 0.0003). Total energy expenditure: A 302.0 ± 46.1 kcal and B 310.6 ± 55.3 kcal (P = 0.4198). RER: A 1.16 ± 0.07 and B 1.00 ± 0.05 (P
- Published
- 2019
15. Метаболизм жирных кислот и инсулиносекреция у детей при сахарном диабете 1 типа и его осложнениях
- Subjects
инсулинсвязывающая активность ,insulin secretion ,lactacidemia ,лактацидемия ,hypoxia ,С-пептид ,insulin binding activity ,жирные кислоты ,гипоксия ,C-peptide ,fatty acids ,инсулиносекреция - Abstract
Изучение состояния углеводного и липидного обменов у 47 детей и подростков, больных сахарным диабетом 1 типа, показало прогрессирующее снижение остаточной инсулиносекреции и инсулинсвязывающей активности лимфоцитов на фоне нарушения метаболизма жирных кислот, что является фактором риска тяжелого течения болезни с быстрым развитием гипоксии и других диабетических осложнений, в том числе функциональных нарушений в пищеварительной системе, The study of the state of carbohydrate and lipid metabolism in 47 children and adolescents with type 1 diabetes mellitus showed a progressive decrease in residual insulin secretion and insulinbinding activity of lymphocytes against the background of metabolic disorders of fatty acids, which are risk factors for severe course of the disease with the rapid development of hypoxia and other diabetic complications, including functional disorders in the digestive system, №06 (2019)
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- 2019
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16. The role of the liver in the changes of acid-base balance and plasma lipids during surface-induced deep hypothermia.
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Shida, Hiroshi, Morimoto, Masami, Inokawa, Koichi, and Tsugane, Jiro
- Abstract
The role of the liver in the changes of acid-base balance and plasma lipids in surface-induced deep hypothermia for open-heart surgery was investigated clinically and experimentally. The metabolic acidosis generally observed in open-heart surgery under surface-induced deep hypothermia is derived from lactacidemia. Although the accelerated anaerobic glycolysis is partly responsible, the depressed acidic metabolite-disposing ability of the liver also plays an important role. The evidence which is presented to show the decrease of plasma lipids other than NEFA under hypothermia is probably due to the hepatic accumulation of lipids and the decreased lipids release from the liver. [ABSTRACT FROM AUTHOR]
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- 1977
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17. Pathogenesis and treatment of metabolic acidosis in open heart surgery under surface induced deep hypothermia.
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Shida, Hiroshi
- Abstract
Metabolic acidosis observed in open heart surgery under surface induced deep hypothermia is due to lactacidemia, but is reversible, returning to precooling level 24 hours after the operation, and it can be considered more or less as a pathognomonic finding. Although the correction of acidosis present did not influence the level of lactic acid in blood, it was found to be clinically advantageous during the heartresuscitation. Therefore, it is advisable to maintain acid-base balance within-10 mEq per 1 of base excess. [ABSTRACT FROM AUTHOR]
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- 1974
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18. Hyperlactatämie bei Darmischämie.
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Nutz, V. and Sommer, H.
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Copyright of Langenbecks Archiv fuer Chirurgie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 1987
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19. Oculo-auriculo-vertebral spectrum associated to progressive external ophthalmoplegia. Biological, laboratory, electrophysiological and clinical aspects
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Gian Luigi Mariottini, Enrico Calcagno, Berio A, Giacomo Garlaschi, and Attilia Piazzi
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business.industry ,External ophthalmoplegia ,Biochemistry (medical) ,Plant Science ,Anatomy ,Pyruvicemia ,Progressive external ophthalmoplegia ,General Biochemistry, Genetics and Molecular Biology ,Electrophysiology ,lcsh:Biology (General) ,Lactacidemia ,Lactate to Pyruvate ratio ,Medicine ,business ,Malformation ,lcsh:QH301-705.5 ,Oculo-Auriculo-Vertebral Spectrum - Abstract
The authors discuss about the relationships between oculoauriculo- vertebral spectrum (OAVS), a malformative condition affecting eyes, ears and vertebral structures mainly derived from neural crests, and autosomal dominant progressive external ophthalmoplegia (adPEO) – an electron transport chain disorder characterized by palpebral ptosis and muscular symptoms – on the basis of laboratory data and clinical signs in a case belonging to a family in which symptoms of both diseases occur. Hemifacial microsomia and ears abnormalities were the main neural crest cells (NCC) derived signs for OAVS diagnosis. Palpebral ptosis and the associated hyperlactacidemia with high Lactate to Pyruvate ratio were main signs for the suspicion of adPEO, but the diagnosis was proposed by clinical, biochemical, electrophysiological and genetic methods because the biopsy not always is diagnostic, as in our case. The association of two groups of symptoms (malformed, NCCrelated, and myopatic-electron transport related) in the same subject as observed in our case and partially in the family, may be ascribed to nuclear abnormalities and mitochondrial electron transport disorder, respectively, as well as to a possible common etiopathogenetic mechanism. In some cases of OAVS, the malformations may be consequent to oxidative phosphorilation disease (OXPHOS) derangement, as previously demonstrated; the extensive determination of lactacidemia may be important to address the research on OAVS patients in the mitochondrial/OXPHOS genetic domain, with advantage in the knowledge of OAVS pathogenesis.
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- 2018
20. Efeito da suplementação de 'Waxy Maize' sobre a resposta de lactacidemia em praticantes de Jiu – Jitsu
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Neno, Rodrigo Branco and Dantas, Renata A. Elias
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Lactacidemia ,Carboidrato ,Lactato ,Jiu-jitsu - Abstract
Submitted by Gisely Teixeira (gisely.teixeira@uniceub.br) on 2018-06-11T17:45:54Z No. of bitstreams: 1 51400302.pdf: 951474 bytes, checksum: 6859fc26e0890958836dfd821941fdf9 (MD5) Made available in DSpace on 2018-06-11T17:45:54Z (GMT). No. of bitstreams: 1 51400302.pdf: 951474 bytes, checksum: 6859fc26e0890958836dfd821941fdf9 (MD5) Previous issue date: 2018 Neste trabalho, a variável metabólica analisada é a presença de lactato no sangue, ou melhor, a lactacidemia pré e pós - seção de treino de Jiu – Jitsu. O lactato é um sal, produto de via metabólica lática, ou seja, (não é produzido em qualquer circunstância pelo organismo humano). Geralmente, é produto de exercícios de alta intensidade que reflete a característica ácida em que se encontram os tecidos. O objetivo foi avaliar a resposta lactacidêmica em lutadores de Jiu Jitsu em função da suplementação de “Waxy Maize”. Fizeram parte deste estudo vinte (20) voluntários, na cidade de Brasília – DF, divididos aleatoriamente em dois grupos: Grupo Experimental (GE; 10 voluntários) e Grupo Controle (GC; 10 voluntários). Não houve diferença significativa entre os dois grupos na idade (p = 0,205), na massa corporal (p = 0,130), na estatura (p = 0,632), e no índice de massa corporal (p = 0,124). Notam – se diferenças significativas apenas no aumento da concentração de lactato pós – exercício em ambos os grupos quando comparado ao momento pré – treino analisados individualmente. Não se notou efeitos da suplementação “Waxy Maize” para a variação de lactato quando analisados GE e GC.
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- 2018
21. O efeito da alternância nos exercícios de grande e pequenos grupamentos em membros inferiores sobre a lactacidemia e parâmetros cardiovasculares
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Veira da Costa, Giovani, Neto, José Campanholi, Silva Junior, Autran José da, Baldissera, Vilmar, Veira da Costa, Giovani, Neto, José Campanholi, Silva Junior, Autran José da, and Baldissera, Vilmar
- Abstract
O objetivo do presente estudo foi verificar a influência na alternância na ordem de execução de exercícios para membros inferiores: Agachamento Livre (AGL) e cadeira extensora (CE) sobre a lactacidemia, escala de percepção de esforço de OMNI e parâmetros cardiovasculares. 10 voluntários, 27,3±1,7anos; 177,3±2,4cm; 87,5 ± 4,1kg realizaram duas sequencias de 3 séries de 10 repetições a 70% 1RM de agachamento livre (AGL) e cadeira extensora (CE) alternando os exercícios. A 1a sequência AGL e CE e a 2a sequencia CE e AGL. Foram aferidas em repouso e ao final de cada série: lactacidemia, percepção subjetiva de esforço por OMNI, frequência cardíaca, pressão arterial sistólica, pressão arterial diastólica e duplo produto. Todos os parâmetros estudados apresentaram significativas elevações na 2a sequencia quando comparado a 1a sequência. Concluímos, portanto que a realização de uma sequência de exercício resistido iniciando com recrutamento de pequenos grupamentos musculares anterior a grandes grupamentos induz em significativo estresse sobre o sistema metabólico (lactacidemia), esforço percebido (escala de percepção de esforço de OMNI) e sistema cardiovascular (FC, PAS, PAD e DP). Assim sendo, a normativa do American College of Sports Medicine que sugere treinamento de grandes grupamentos anterior a pequenos seja adequada, podemos sugerir que a alternância acarretaria um estresse, sobrecarga e fadiga maiores, talvez seja o objetivo de alguns programas de treinamento resistido com o intuito de hipertrofia muscular. ABSTRACT The effect of alternation in the exercises of large and small groupings in lower limbs on lactacidemia and cardiovascular parametersThe aim of this study was to investigate the influence of alternating the exercises execution order for legs: Squat Free (AGL) and extensor chair (EC) on the lactacidemia, perception scale of OMNI effort and cardiovascular parameters. 10 volunteers 27.3 ± 1.7 anos; 177.3 ± 2.4cm; 87.5 ± 4.1kg were two sequences of 3 sets of
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- 2017
22. Influência da seleção dos estágios incrementais sobre a intensidade de lactato mínimo: estudo piloto
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Willian Eiji Miyagi, Alessandro Moura Zagatto, Jorge Vieira de Mello Leite, Universidade Federal de Mato Grosso do Sul (UFMS), and Universidade Estadual Paulista (Unesp)
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medicine.medical_specialty ,Physiology ,Respiratory compensation ,Two stages ,modelo matemático ,lcsh:GV557-1198.995 ,Mathematical model ,Animal science ,Aerobic capacity ,Physiology (medical) ,Heart rate ,medicine ,Cycle ergometer ,Wingate test ,Mathematics ,Rating of perceived exertion ,lcsh:Sports ,lactacidemia ,lcsh:R5-920 ,Lactate-intensity relationship ,Oxygen uptake ,Surgery ,relação lactato-intensidade ,Lactatemia ,capacidade aeróbia ,Hyperlactatemia ,lcsh:Medicine (General) - Abstract
Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:30:41Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:38:00Z : No. of bitstreams: 1 2-s2.0-84883425190.pdf: 234367 bytes, checksum: 8a5cedb1ee154771e39ac7d7fefde9ae (MD5) Made available in DSpace on 2014-05-27T11:30:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-09-09 The purposes of this study were to assess the influence of stage selection from the incremental phase and the use of peak lactate after hyperlactatemia induction on the determination of the lactate minimum intensity (iLACmin). Twelve moderately active university students (23±5 years, 78.3±14.1 kg, 175.3±5.1 cm) performed a maximal incremental test to determine the respiratory compensation point (RCP) (initial intensity at 70 W and increments of 17.5 W every 2 minutes) and a lactate minimum test (induction with the Wingate test, the incremental test started at 30 W below RCP with increments of 10 W every 3 minutes) on a cycle ergometer. The iLACmin was determined using second order polynomial adjustment applying five exercise stage selection: 1) using all stages (iLACmin P); 2) using all stages below and two stages above iLACminP(iLACminA); 3) using two stages below and all stages above iLACminP(iLACminB); 4) using the largest and same possible number of stages below and above the iLACminP(iLACminI); 5) using all stages and peak lactate after hyperlactatemia induction (iLACminD). No differences were found between the iLACminP(138.2±30.2 W), iLACminA(139.1±29.1 W), iLACminB(135.3±14.2 W), iLACminI(138.6±20.5 W) and iLACmiD(136.7±28.5 W) protocols, and a high level of agreement between these intensities and iLACminPwas observed. Oxygen uptake, heart rate, rating of perceived exertion and lactate corresponding to these intensities was not different and was strongly correlated. However, the iLACminBpresented the lowest success rate (66.7%). In conclusion, stage selection did not influence the determination of iLACmin but modified the success rate. © Creative Commom. Universidade Federal de Mato Grosso do Sul Laboratório de Pesquisa em Fisiologia do Exercício Centro de Ciências Humanas e Sociais, Campo Grande, MS Universidade Estadual Paulista Departamento de Educação Física, Bauru, SP Universidade Estadual Paulista Departamento de Educação Física, Bauru, SP
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- 2013
23. Basal plasma corticosterone level after bilateral selective lesions of thee olfactory pathways in the rat.
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Cattarelli, M. and Demaël, A.
- Abstract
In comparison to control rats, basal plasma corticosterone level and lactacidemia significantly increased in rats submitted to a bilateral lesion of the lateral olfactory tract and/or the anterior branch of the anterior commissure. Only the anterior branch of the anterior commissure induced hyperglycemia; that of the lateral olfactory tract exerted an opposite effect. [ABSTRACT FROM AUTHOR]
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- 1986
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24. Ansiedad, percepción subjetiva del esfuerzo y valoración de lactacidemia en situación competitiva en karatekas. Un estudio desde la teoría del procesamiento eficiente
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Martínez Aranda, Luis Manuel, Ariza Vargas, Leopoldo, and Pérez López, Isaac
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Karate ,Ansiedad ,Requerimientos energéticos ,Lactacidemia ,Impacto fisiológico ,Metabolismo energético ,Competición ,Estrés - Abstract
La mayor parte de los estudios relacionados con el Karate, se desarrollan en condiciones de laboratorio, entrenamiento variado o competición simulada, esta circunstancia nos lleva a plantear la necesidad de abordar nuevas investigaciones que contemplen situaciones de competición real, para poder realizar contrastaciones y extrapolaciones de carácter funcional. La problemática es que estos estudios, aun tomando datos en competición simulada, se han ceñido a parámetros de corte fisiológico exclusivamente, ignorando algo muy importante en el mundo de la competición como son los parámetros psicológicos que entran en juego cuando el competidor se enfrenta a un reto. En este sentido, se cree que los principales efectos de la ansiedad, como uno de los parámetros psicológicos presentes en la competición, se producen sobre el ejecutivo central, el cual es el responsable directo del procesamiento activo de información y la autorregulación de las funciones. La ansiedad afecta principalmente a la eficiencia del procesamiento que es la relación entre la calidad del procesamiento y el esfuerzo realizado para conseguirla. Asumiendo esta información desde la Teoría del Procesamiento Eficiente, es posible generalizar que en el Karate de competición, la influencia del estado de ansiedad pueda provocar un descenso en dicha eficiencia por acción directa de los componentes que la forman, pudiendo contribuir a una distorsión en la interpretación de la misma, modificando entre otros posibles elementos, el informe de un indicador de carácter subjetivo como es la RPE. Por ello, el presente estudio, se centra principalmente en el análisis de la posible influencia y efecto de la ansiedad sobre el informe de RPE en competición, a partir de los postulados de la Teoría de Procesamiento Eficiente, tomando como referencia objetiva, un indicador externo relativo al impacto fisiológico (lactacto sanguíneo).
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- 2014
25. Clinical Value of Lactate Concentration in Blood Plasma at the Patients with the Signs of Sepsis (Literature Review with Own Findings)
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Nikonov, V.V. and Kursov, S.V.
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abdominal sepsis ,lactate ,lactacidemia ,fluid resuscitation ,crystalloids ,modified gelatine ,hydroxiethylstarch ,абдомінальний сепсис ,лактат ,лактацидемія ,рідинна ресусцитація ,кристалоїди ,модифікована желатина ,гідроксіетилкрохмаль ,абдоминальный сепсис ,лактацидемия ,жидкостная ресусцитация ,кристаллоиды ,модифицированная желатина ,гидроксиэтилкрахмал - Abstract
У першій частині статті подано огляд літератури, присвячений вивченню концентрації лактату плазми крові у хворих із сепсисом. Відзначено, що, незважаючи на численні причини лактацидемії, включаючи тяжкі стреси, застосування бета-адреноміметиків, підвищену рухову активність, тремор, судоми, інфузії фруктози, етанолу, багатоатомних спиртів, використання високих доз глюкози, патологію печінки тощо, у хворих із сепсисом вона частіше відображає наявність тканинної гіпоперфузії і тяжких розладів енергопродукції в результаті мітохондріальної дисфункції. Високі показники концентрації лактату в плазмі крові у хворих із сепсисом, відсутність кліренсу лактату є несприятливою прогностичною ознакою і часто поєднані з високою вірогідністю летального кінця. У другій частині статті наводяться результати дослідження концентрації лактату в плазмі крові в 101 пацієнта з абдомінальним сепсисом на 1-шу, 2-гу и 5-ту добу після операції. Групи дослідження сформовані відповідно до рівня оцінки тяжкості стану хворих за шкалою Acute Physiology And Chronic Health Evaluation II (APACHE II) (не більше 10 балів, 11–20 балів, понад 20 балів) і якісного складу рідинної ресусцитації (тільки кристалоїди, сполучення кристалоїдів з 4% розчином модифікованої желатини, сполучення кристалоїдів з 6% гідроксіетилкрохмалем (ГЕК) 200/0,5, поєднання кристалоїдів з 6% розчином ГЕК 130/0,42).Виявлено, що концентрація лактату зростала разом із величиною оцінки тяжкості стану хворих із сепсисом за шкалою APACHE II. Склад рідинної ресусцитації вірогідно не впливав на динаміку нормалізації рівня лактату в пацієнтів з оцінкою тяжкості стану, що не перевищувала 10 балів. У хворих з оцінкою тяжкості стану в межах 11–20 балів включення до складу рідинної ресусцитації колоїдних плазмозамінників на основі ГЕК вірогідно порівняно з використанням виключно кристалоїдних розчинів забезпечувало більш низьку концентрацію лактату в плазмі й більш швидку її нормалізацію. У пацієнтів з оцінкою тяжкості стану понад 20 балів для нормалізації рівня лактату використання усіх колоїдних плазмозамінників показало переваги порівняно з інфузією виключно кристалоїдів. Усі хворі (n = 3), у яких була констатована концентрація лактату в плазмі крові, що перевищувала 4,0 ммоль, загинули. Нормалізація рівня лактату плазми відбувалася швидше в пацієнтів із низькими оцінками тяжкості стану за шкалою APACHE II. Для зниження тяжкості лактацидемії використання похідних ГЕК мало переваги перед модифікованою желатиною., В первой части статьи представлен обзор литературы, посвященный изучению концентрации лактата плазмы крови у больных с сепсисом. Отмечено, что, несмотря на многочисленные причины лактацидемии, включая тяжелые стрессы, применение бета-адреномиметиков, повышенную двигательную активность, тремор, судороги, инфузии фруктозы, этанола, многоатомных спиртов, использование высоких доз глюкозы, патологию печени и др., у больных с сепсисом она чаще отражает наличие тканевой гипоперфузии и тяжелых расстройств энергопродукции в результате митохондриальной дисфункции. Высокие показатели концентрации лактата в плазме крови у больных с сепсисом, отсутствие клиренса лактата являются неблагоприятным прогностическим признаком и часто сопряжены с высокой вероятностью летального исхода.Во второй части статьи приводятся результаты исследования концентрации лактата в плазме крови у 101 пациента с абдоминальным сепсисом в 1-е, 3-и и 5-е сутки после операции. Группы исследования сформированы соответственно уровню оценки тяжести состояния больных по шкале Acute Physiology And Chronic Health Evaluation II (APACHE II) (не более 10 баллов, 11–20 баллов, свыше 20 баллов) и качественному составу жидкостной ресусцитации (только кристаллоиды, сочетание кристаллоидов с 4% раствором модифицированной желатины, сочетание кристаллоидов с 6% гидроксиэтилкрахмалом (ГЭК) 200/0,5, сочетание кристаллоидов с 6% раствором ГЭК 130/0,42).Выявлено, что концентрация лактата возрастала вместе с величиной оценки тяжести состояния больных с сепсисом по шкале APACHE II. Состав жидкостной ресусцитации достоверно не оказал влияния на динамику нормализации уровня лактата у пациентов с оценкой тяжести состояния, не превышающей 10 баллов. У больных с оценкой тяжести состояния в пределах 11–20 баллов включение в состав жидкостной ресусцитации коллоидных плазмозаменителей на основе ГЭК достоверно по сравнению с использованием исключительно кристаллоидных растворов обеспечивало более низкую концентрацию лактата в плазме и более быструю ее нормализацию. У пациентов с оценкой тяжести состояния, превышающей 20 баллов, для нормализации уровня лактата использование всех коллоидных плазмозаменителей показало преимущество перед инфузией исключительно кристаллоидов. Все больные (n = 3), у которых была констатирована концентрация лактата в плазме крови, превышающая 4,0 ммоль/л, погибли. Нормализация уровня лактата плазмы происходила быстрее у пациентов с низкими оценками тяжести состояния по шкале APACHE II. Для снижения тяжести лактацидемии использование производных ГЭК имело преимущество перед модифицированной желатиной., The first part of the article provides a literary review devoted to the study of lactate concentration in blood plasma at the patients with sepsis. It has been noted that despite various reasons of lactacidemia including severe stress, the usage of beta-adrenomimetics, an increased motional activity, tremor, spasms, infusions of fructose, ethanol, polyatomic alcohols, the usage of a high dose of glucose, liver pathology etc., at the patients with sepsis it more often reflects the presence of tissue hypoperfusion and that of severe failure of energy production resulting from mitochondrion dysfunction. High indices of lactate concentration in the blood plasma at the patients with sepsis, the absence of lactate clearance are unfavorable forecasting signs and are often connected with a high possibility of lethal outcomes.The second part of the article presents the outcomes of the research of lactate concentration in blood plasma at 101 patients with abdominal sepsis on the first, third and fifth day after the operation. The research groups were formed in accordance with the estimation level of the patient’s state severity according to the scale Acute Physiology And Chronic Health Evaluation-II (APACHE-II) (not more than 10 grades, 11-20 grades, more than 20 grades) and to the qualitative composition of fluid resuscitation (only crystalloids, the combination of crystalloids with a 4 % solution of modified gelatine, the combination of crystalloids with a 6 % hydroxiethylstarch (HES) 200/0.5, the combination of crystalloids with the HES solution 130/0.42).It has been revealed that lactate concentration increased with the value of the state severity estimation according to the scale APACHE-II at the patients with sepsis. The composition of fluid resuscitation has not influenced the normalization dynamics of the lactate level at the patients with the state severity estimation of not more than 10 grades. At the patients with the state severity estimation within 11-20 grades, the inclusion of colloid plasma substitutes on the basis of HES to the fluid resuscitation, in comparison with the crystalloid solutions only, provided for a lower lactate concentration in plasma and for its faster normalization. At the patients with the state severity estimation more than 20 grades the usage of all colloid plasma substitutes for the lactate level normalization has shown the advantage over the infusion of crystalloids only. All patients (n=3) with the established lactate concentration in blood plasma exceeding 4.0 mmole/l have died. The normalization of the plasma lactate level occurred faster at the patients with a low state severity estimation according to APACHE-II scale. In lowering the severity of lactacidemia, the usage of HES derivatives had an advantage over modified gelatine.
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- 2013
26. Influence of the selection from incremental stages on lactate minimum intensity: a pilot study
- Author
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Miyagi, Willian Eiji, Leite, Jorge Vieira de Mello, and Zagatto, Alessandro Moura
- Subjects
lcsh:Sports ,Modelo matemático ,lcsh:R5-920 ,Mathematical ,Lactate-intensity relationship ,lcsh:GV557-1198.995 ,Mathematical model ,Capacidade Aeróbia ,Relação lactato-intensidade ,Aerobic capacity ,Lactatemia ,Lactacidemia ,lcsh:Medicine (General) - Abstract
The purposes of this study were to assess the influence of stage selection from the incremental phase and the use of peak lactate after hyperlactatemia induction on the determination of the lactate minimum intensity (iLACmin). Twelve moderately active university students (23±5 years, 78.3±14.1 kg, 175.3±5.1 cm) performed a maximal incremental test to determine the respiratory compensation point (RCP) (initial intensity at 70 W and increments of 17.5 W every 2 minutes) and a lactate minimum test (induction with the Wingate test, the incremental test started at 30 W below RCP with increments of 10 W every 3 minutes) on a cycle ergometer. The iLACmin was determined using second order polynomial adjustment applying five exercise stage selection: 1) using all stages (iL-ACminP); 2) using all stages below and two stages above iLACminP (iLACminA); 3) using two stages below and all stages above iLACminP (iLACminB); 4) using the largest and same possible number of stages below and above the iLACminP (iLACminI); 5) using all stages and peak lactate after hyperlactatemia induction (iLACminD). No differences were found between the iLACminP (138.2±30.2 W), iLACminA (139.1±29.1 W), iLACminB (135.3±14.2 W), iLACminI (138.6±20.5 W) and iLACmiD (136.7±28.5 W) protocols, and a high level of agreement between these intensities and iLACminP was observed. Oxygen uptake, heart rate, rating of perceived exertion and lactate corresponding to these intensities was not different and was strongly correlated. However, the iLACminB presented the lowest success rate (66.7%). In conclusion, stage selection did not influence the determination of iLACmin but modified the success rate. Os objetivos foram verificar a influência da seleção de estágios da fase incremental e o uso do lactato pico após indução hiperlactacidêmica na determinação da intensidade de lactato mínimo (iLACmin). Doze universitários moderadamente ativos (23±5 anos, 78,3±14,1 kg, 175,3± 5,1 cm) realizaram um teste incremental máximo para determinação do ponto de compensação respiratório (PCR) (início a 70 W e incrementos de 17,5 W a cada 2 minutos) e um teste de lactato mínimo (indução com Wingate, fase incremental iniciado a 30 W abaixo do PCR e incrementos de 10 W a cada 3 minutos) em cicloergômetro. A iLACmin foi determinada utilizando ajuste polinomial de segunda ordem, aplicando cinco seleções de estágios da fase incremental: 1) Utilizando todos os estágios obtidos (iLACminP); 2) Utilizando todos os estágios antes e dois após à iLACminP (iLACminA); 3) Utilizando dois estágios antes e todos após à iLACminP (iLACminB); 4) Utilizando o maior e mesmo número possível de estágios anteriores e posteriores à iLACminP (iLACminI); 5) Utilizando todos os estágios e o lactato pico após indução (iLACminD). Não foram encontradas diferenças entre iLACminP (138,2±30,2 W), iLACminA (139,1±29,1 W), iLACminB (135,3±14,2 W), iLACminI (138,6±20,5 W), iLACmiD (136,7±28,5 W) e verificou-se alta concordância entre essas intensidades e iLACminP. O consumo de oxigênio, frequência cardíaca, percepção subjetiva de esforço e lactato nessas intensidades não diferiram e foram fortemente correlacionadas. Entretanto, a iLACminB apresentou o menor índice de sucesso (66,7%). Conclui-se que a seleção de estágios não influenciou na determinação da iLACmin, mas alterou o índice de sucesso.
- Published
- 2013
27. Interação da variabilidade da freqüência cardíaca e do lactato sanguíneo durante o exercício resistido em idosos saudáveis
- Author
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Simões, Rodrigo Polaquini and Silva, Audrey Borghi
- Subjects
Anaerobic threshold ,Lactacidemia ,Blood lactate ,Autonomic nervous system ,Variabilidade da freqüência cardíaca ,Limiar anaeróbio ,Exercício resistido ,Idosos saudáveis ,MEDICINA::CLINICA MEDICA::FISIATRIA [CIENCIAS DA SAUDE] ,Fisiologia do exercício físico - freqüência cardíaca ,Heart rate variability ,Resistance exercise - Abstract
Universidade Federal de Minas Gerais The anaerobic threshold (AT) is an important parameter for prescription of physical exercise in various clinical conditions, because represent the intensity of effort at which the aerobic metabolism begins to be supplemented by anaerobic metabolism for the production of energy. In this context, different methods to identify AT have been described, for example by analysis of blood lactate and the respiratory gas exchanges, yet such methods require expensive equipment and materials. Low cost non-invasive techniques such as heart rate variability (HRV) have been proposed to determine the AT; however, they are most commonly applied in discontinuous protocols on a cycle ergometer or treadmill. Therefore, the objectives of this study were to evaluate the behavior of HRV and blood lactate during resistance exercise (RE) with increasing resistances at a percentage of one repetition maximum (1RM), and investigate the existence of an aerobic-anaerobic transition point in the metabolism during lower leg exercise in healthy older adults. Secondarily, our objective was to evaluate the relationship between different methods, as well as the degree of concordance between the same. Ten healthy men ranging in age from 60 to 70 years old (mean and SD: 64 ± 4 years, 166 ± 3 cm, 70 ± 7 kg), underwent medical examination, ergonomic testing and laboratory exams (hemogram, triglycerides, total and fractional cholesterols, glycemia and uric acid. The protocol for RE was administered on Leg Press 45° (Pró-Fitness) equipment. The protocol resistance loads used were determined by 1RM test; the volunteer complete one full cycle on the equipment at the maximum resistance load that the volunteer could achieve, and the resistance load increases were calculated from this test value at rates of 10% of 1RM until a 30% increase and then at increments of 5% until exhaustion. At each percentage increase of effort, the volunteer performed 4 minutes of exercise followed a rest interval of 15 minutes. Heart rate was captured throughout the protocol by a Polar Vantage Heart rate monitor connected to a Polar Advantage Interface that transmitted the data in real time to a Soyo Notebook computer. The blood samples were collected before the initial effort and immediately after the end of each resistance load. Blood lactate and HRV were analyzed at rest conditions with the volunteer positioned on the equipment and at each percentage of effort. The indexes utilized for HRV analysis were RMSSD, RMSM, SD1, SD2 and SD1/SD2 ratio. To identify the aerobic-anaerobic transition point, blood lactate concentrations were used (gold standard) as well as SD1 and RMSSD indexes; and these points were denominated as lactate threshold (LT), SD1 threshold (SD1T) and RMSSD threshold (RMSSDT). The level of significance for all statistical tests was set at 5%. The principal result showed that the mean of the RMSSD, RMSM and SD1 indexes reduced significantly at 30% 1RM in relation to the rest condition, and blood lactate presented an exponential increase at 30% 1RM, that was significantly greater in relation to the rest condition at 35%. There was no significant difference in relation to absolute and relative values for resistance loads at which the aerobic-anaerobic transition point was identified (absolute values: LT = 101 ± 32 kg, SD1T = 96 ± 28 kg, RMSSDT = 97 ± 21 kg; Relative values: LT = 30 ± 6%, SD1T = 29 ± 6%, RMSSDT = 29 ± 5%). Additionally, good concordance and good correlation were found between LT and RMSSDT (r = 0.78) and between LT and SD1T (0.81). It can be concluded that the behavior of HRV and blood lactate change markedly at 30% 1RM during resistance exercise on the Leg Press 45°. It was possible at this percentage to identify the aerobic-anaerobic metabolism transition point by blood lactate as well as by HRV in healthy older men. físico em várias condições clínicas, pois representa a intensidade de esforço a qual o metabolismo aeróbio passa a ser suplementado pelo metabolismo anaeróbio para a produção de energia. Neste contexto, tem sido descritos diferentes métodos para a determinação do LA por meio de análises da concentração sangüínea de lactato e das trocas gasosas respiratórias, entretanto, tais métodos necessitam de equipamentos e materiais de alto custo. Desta forma, técnicas não-invasivas e de baixo custo como as análises da variabilidade da freqüência cardíaca (VFC) têm sido propostas para determinação do LA, no entanto, em sua grande maioria tem sido aplicadas em protocolos descontínuos em cicloergômetro ou esteira. Assim, os objetivos deste estudo foram avaliar o comportamento da VFC e do lactato sangüíneo durante o exercício físico resistido (EFR) com o incremento de resistência em percentual de uma repetição máxima (1RM), e investigar a existência de um ponto de transição do metabolismo aeróbio-anaeróbio durante o exercício resistido de membros inferiores em idosos saudáveis. Secundariamente, tivemos como objetivo avaliar o relacionamento entre os diferentes métodos, bem como o grau de concordância dos mesmos. Foram avaliados 10 homens saudáveis com faixa etária entre 60 e 70 anos (média e DP: 64 ± 4 anos, 166 ± 3 cm, 70 ± 7 kg), sendo submetidos à avaliação médica, teste ergométrico e solicitado exames laboratoriais (hemograma, triglicérides, colesterol total e frações, glicemia e ácido úrico). O protocolo de EFR foi aplicado no equipamento Leg Press 45° (Pró-Fitness) sendo que para a determinação das cargas que seriam utilizas, foi realizado previamente o teste de 1RM, no qual o voluntário fez apenas um ciclo completo do movimento no equipamento com a carga máxima suportada, e a partir deste valor, foi estabelecido o protocolo de incremento de cargas, partindo de 10% de 1RM, com acréscimos subseqüentes de 10% até a carga de 30%, e de 5% a partir desta, até a exaustão voluntária. Em cada percentual de esforço, o voluntário foi submetido a 4 minutos de exercício e 15 minutos de repouso pós-esforço. A freqüência cardíaca (FC) foi captada durante todo protocolo por um cardiofreqüencímetro (Polar Vantage) interligado a uma interface (Polar Advantage), que transmitia os dados online para o computador (Notebook Soyo). Para a analise do lactato, foram coletadas amostras de sangue previamente ao início do esforço e imediatamente após o término de cada carga aplicada. Tanto o lactato sangüíneo quanto a VFC foram analisados nas condições de repouso, com o voluntário posicionado no equipamento, e em cada percentual de esforço. Os índices utilizados para a análise da VFC foram o RMSSD, RMSM, SD1, SD2 e a razão SD1/SD2. Para a identificação do ponto de transição aeróbio-anaeróbio as concentrações de lactato sangüíneo foram utilizadas como padrão ouro, sendo também utilizados os índices SD1 e RMSSD; estes pontos foram denominados de limiar de lactato (LL), limiar de SD1 (LSD1) e limiar de RMSSD (LRMSSD). O nível de significância adotado em todos testes estatísticos foi de 5%. Os principais resultados mostraram que os índices RMSSD, RMSM e SD1 reduziram significativamente a partir dos 30% de 1RM em relação à condição de repouso, tal como o lactato sangüíneo apresentou aumento exponencial a partir dos 30% de 1RM. Não houve diferença significativa para os valores absolutos e relativos da carga na qual o ponto de transição aeróbio-anaeróbio foi identificado (valores absolutos: LL = 101 ± 32 kg, LSD1 = 96 ± 28 kg, LRMSSD = 97 ± 21 kg; valores relativos: LL = 30 ± 6%, LSD1 = 29 ± 6%, LRMSSD = 29 ± 5%). Adicionalmente, boa concordância e fortes correlações foram encontradas entre o LL e LRMSSD (r = 0,78) e entre o LL e LSD1 (0,81). Conclui-se que o comportamento da VFC e do lactato sangüíneo se modifica marcantemente a partir dos 30% de 1RM durante o exercício resistido realizado no Leg Press a 45°, sendo que neste percentual foi possível identificar o ponto de transição do metabolismo aeróbio-anaeróbio, tanto por meio da lactacidemia como pela VFC em idosos saudáveis.
- Published
- 2008
28. Determinações e relações dos parâmetros anaeróbios do RAST, do limiar anaeróbio e da resposta lactacidemica obtida no início, no intervalo e ao final de uma partida oficial de handebol
- Author
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Alex Zelanti Roseguini, Adelino Sanchez Ramos da Silva, Claudio Alexandre Gobatto, and Universidade Estadual Paulista (Unesp)
- Subjects
lactacidemia ,Post hoc ,lactatemia ,Anova test ,anaerobic parameters ,Physical Therapy, Sports Therapy and Rehabilitation ,aerobic capacity ,parâmetros anaeróbios ,Animal science ,Sprint ,Statistical significance ,capacidade aeróbia ,Blood lactate ,Orthopedics and Sports Medicine ,Anaerobic exercise ,Mathematics - Abstract
Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:41:41Z No. of bitstreams: 1 S1517-86922008000100009.pdf: 229857 bytes, checksum: f209ddace31428b3247d8b37270ead21 (MD5) Made available in DSpace on 2013-08-22T18:41:41Z (GMT). No. of bitstreams: 1 S1517-86922008000100009.pdf: 229857 bytes, checksum: f209ddace31428b3247d8b37270ead21 (MD5) Previous issue date: 2008-02-01 Made available in DSpace on 2013-09-30T19:28:25Z (GMT). No. of bitstreams: 2 S1517-86922008000100009.pdf: 229857 bytes, checksum: f209ddace31428b3247d8b37270ead21 (MD5) S1517-86922008000100009.pdf.txt: 31834 bytes, checksum: 73510bf78a0e09a08384fa1b79f1f3a0 (MD5) Previous issue date: 2008-02-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:58:08Z No. of bitstreams: 2 S1517-86922008000100009.pdf: 229857 bytes, checksum: f209ddace31428b3247d8b37270ead21 (MD5) S1517-86922008000100009.pdf.txt: 31834 bytes, checksum: 73510bf78a0e09a08384fa1b79f1f3a0 (MD5) Made available in DSpace on 2014-05-20T13:58:08Z (GMT). No. of bitstreams: 2 S1517-86922008000100009.pdf: 229857 bytes, checksum: f209ddace31428b3247d8b37270ead21 (MD5) S1517-86922008000100009.pdf.txt: 31834 bytes, checksum: 73510bf78a0e09a08384fa1b79f1f3a0 (MD5) Previous issue date: 2008-02-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) O principal objetivo do presente estudo foi determinar os parâmetros anaeróbios obtidos através do RAST (Running-based Anaerobic Sprint Test) e o limiar anaeróbio de 12 atletas filiados a Federação Paulista de Handebol. Além disso, também procuramos verificar as correlações entre as variáveis do RAST, o limiar anaeróbio e a resposta lactacidemica obtida no início, no intervalo e ao final de uma partida oficial de handebol. As avaliações foram conduzidas em 2 dias. No primeiro dia, os atletas foram submetidos ao RAST e em seguida foi determinado o limiar anaeróbio de cada atleta através de um protocolo adaptado ao de Tegtbur et al. (1993). No segundo dia, durante a disputa de uma partida oficial de handebol, foram coletadas amostras de sangue para determinação das concentrações de lactato no início, no intervalo e ao final do jogo. Foi utilizado o teste Anova para dados repetidos, seguido pelo post hoc de Newman-Keuls quando necessário, com o intuito de comparar as concentrações de lactato obtidas ao longo da partida de handebol e a correspondente ao limiar anaeróbio. A análise de correlação de Pearson foi utilizada para verificar as relações entre os parâmetros anaeróbios, o limiar anaeróbio e as concentrações de lactato obtidas durante uma partida oficial de handebol. Para todos os casos o nível de significância foi pré-fixado em 5%. Não foram verificadas correlações dos parâmetros anaeróbios do RAST e do limiar anaeróbio com as respostas lactacidemicas durante a partida de handebol. de acordo com os resultados obtidos no presente estudo, podemos concluir que embora o protocolo proposto para a avaliação do limiar anaeróbio também forneça parâmetros anaeróbios e se aproxime das situações reais do jogo de handebol, não foram encontradas correlações significativas entre as variáveis determinadas na avaliação com as concentrações de lactato obtidas durante a partida oficial de handebol. The main purpose of the present study was to determine the anaerobic parameters obtained by the RAST (Running-based Anaerobic Sprint Test) and the anaerobic threshold of twelve handballers affiliated with the Handball Federation of São Paulo. Moreover, we aimed to study the relationship of the RAST variables, the anaerobic threshold and the lactacidemia response obtained at the beginning, at the interval and at the end of a an official handball match. Measurements were carried out in two days. on the first day, the athletes performed the RAST and then, the anaerobic threshold was obtained by a protocol adapted from Tegtbur et al. (1993). on the second day, the athletes had blood samples collected to determine the blood lactate responses during the three different times of the handball game. Repeated measurements Anova test followed by post hoc Newman-Keuls test whenever needed, were used to compare the blood lactate concentrations during the handball match as well as that one corresponding to the anaerobic threshold. Pearson product-moment coefficient analysis was used to verify the relationships of the RAST variables, the anaerobic threshold and the blood lactate obtained at the beginning, in the middle and at the end of an official handball match. A significance level of 5% was chosen for all cases. Correlations between the RAST parameters and the anaerobic threshold with the blood lactate responses during the handball match have not been observed. According to our results, it is possible to conclude that the variables obtained by the protocol proposed to determine the anaerobic threshold did not present significant correlations with the blood lactate concentrations obtained during the official handball match. Universidade Estadual Paulista Júlio de Mesquita Filho Laboratório de Fisiologia Aplicada ao Esporte Universidade Estadual Paulista Júlio de Mesquita Filho Laboratório de Fisiologia Aplicada ao Esporte
- Published
- 2008
29. Efects of Physical Training asthsmatic women
- Author
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Silva, Tatiane Lopes Patrocinio da and Costa, Dirceu
- Subjects
Fisioterapia respiratória ,Lactacidemia ,FISIOTERAPIA E TERAPIA OCUPACIONAL [CIENCIAS DA SAUDE] ,Exercícios terapêuticos ,Ergoespirometria ,Asma - Abstract
Universidade Federal de Sao Carlos The aim of this study was to evaluate the effects of the lower and upper limb physical training (LLPT), arms muscle training (AMT) associated with and of the respiratory reeducation functional techniques (RFR) on asthmatic patients. The cardiopulmonary function was evaluated before and after the physical training. It was analyzed the Maximal and Submaximal cardiopulmonary test (CPT), the Heart Rate (HR), the dyspnea sensation, ventilatory and metabolic variables, the distance walked in 6 minutes, the variables of the spirometry, the respiratory muscle strength (RMS), though the maximum inspiratory pressure (PImax) and maximum expiratory pressures (PEmax), and the toracoabdominal cirtometry. Moreover it was objectified to evaluate the methods of determination of the anaerobic threshold (AT), from the ergoespirometry and lactacidemy. Nine asthmatic patients (GA) and 9 health individuals (GC) were evaluated. The asthmatic patients constituted the treated group and performed the training (PT + AMT +RFR), three times per week, during 12 weeks. The health subjects constituted the control group. The initial evaluation was consisted of an anamnesis, a physical examination, a maximal and submaximal CPT, a Spirometry and a 6WD test. Moreover, they had been submitted still to the measure of toraco-abdominal cirtometry (in the levels axillary, xifoidiano and abdominal), of the PImáx the PEmáx the Blood Pressure (HR and the Saturation of oxygen (SpO2). In the end of the training the patients were reevaluated. The individuals of the GC were submitted to the same evaluation. It was observed a significant reduction in the the values found in the RMS, spirometry, 6WD test, tolerance to exercise and peripheral muscle force (Mann-Whitney) in treated subjects when compared with health subjects. Already the treat groups had presented significant increases of the daily pay for the one after treatment in the values of PImáx and PEmáx, covered distance on 6WD. Moreover, it was observed an in increase in the HR peak, VE, VO2 peak, VCO2 peak, metabolic and ventilatory AT, speed peak, covered distance and in peripheral muscle force. It can be conclude, that the predict equation proposed to evaluate the respiratory muscle strength and covered distance on 6WD test was adequate to provided values of reference for such testes on the volunteers of this study. The 6WD test on treadmill did not differ from the 6WD on corridor and it can be an alternative on the evaluation of asthmatic individuals. The AT determinate by invasive and non-invasive methodology was similar. The association of the AMT, PT and the RFR provided an improvement in the physiological variables analyzed and can promote profits of the cardiorrespiratory performance in asthmatic patients. Este estudo teve como objetivos avaliar os efeitos de um programa de treinamento físico (TF) que consistiu de: treinamento Físico de membros inferiores (TFMI), treinamento resistido de membros superiores (TRMS) e de algumas técnicas de reeducação funcional respiratória (RFR) em mulheres asmáticas, envolvendo métodos de avaliação das variáveis fisiológicas de um teste cardipulmonar limitado por sintomas (TCP), teste submáximo (TS), (Freqüência cardíaca (FC), sensação de dispnéia (BORG), variáveis ventilatórias e metabólicas), teste de caminhada de 6 minutos (TC6 ) (FC, distância percorrida (DP) e BORG); bem como da espirometria e força muscular respiratória (FMR), a partir das pressões inspiratórias (PImax) e expiratórias máximas (PEmax) e cirtometria tóraco abdominal. Além disso, objetivou-se avaliar os métodos de determinação do limiar de anaerobiose (LA), a partir da ergoespirometria e lactacidemia, bem como comparar os valores de FMR e distância percorrida no TC6 com os valores de referência e comparar o TC6 em corredor com o TC6 em esteira. Participaram do estudo 9 mulheres asmáticas as quais compuseram o gupo asmático (GA), que realizaram TFMI, TRMS e RFR e 9 voluntárias saudáveis que formaram o grupo controle (GC). Todos os voluntários passaram por uma avaliação inicial que constou de anamnese, exame físico, TCP, TS, espirometria, TC6'. Além disso, foram submetidos ainda à medida de cirtometria tóraco-abdominal (nos níveis axilar, xifoidiano e abdominal), da PImax, da PEmax, da pressão arterial (PA), da FC e da saturação de oxigênio (SpO2). Os pacientes realizaram um programa de tratamento durante três meses, três vezes por semana, por doze semanas consecutivas, sendo reavaliados ao final do treinamento. Os indivíduos do GC foram submetidos às avaliações. Quando os asmáticos foram comparados com o grupo controle observou-se reduções significativas dos valores, em relação à: FMR, variáveis espirométricas, TC6 , tolerância ao exercício máximo e força muscular periférica (Mann-Whitney). O grupo tratado apresentou aumentos significativos do pré para o pós tratamento nos valores de PImax e PEmax, na DP no TC6 . No TCP observou-se aumentos ao final do teste da: FC pico, VE, VO2 pico, VCO2 pico, LA metabólico e ventilatório, velocidade pico e DP. No TS observou-se aumentos ao final do teste da: VO2, VCO2, velocidade e distância percorrida e diminuição da FC e lactato. Também foi observado aumento significativo da força muscular periférica. Pode-se concluir, então, que as fórmulas preditivas propostas para obtenção da força muscular respiratória e distância de caminhada no TC6 mostraram-se adequadas em fornecer valores de referência para estes testes, nos voluntários saudáveis e asmáticos deste estudo. O TC6 E não mostrou diferença com o TC6 C sendo uma alternativa na avaliação de indivíduos asmáticos. O LA determinado por metodologia invasiva e não invasiva foram determinados na mesma intensidade de esforço físico no TCP. O TRMS e TF proporcionam melhora nas adaptações fisiológicas, podem promover ganhos da performance cardiorrespiratória em pacientes asmáticos.
- Published
- 2006
30. Lactacidemia en el umbral anaeróbico. Estudio en varones prepúberes de escuelas deportivas de fútbol
- Author
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Micó Pérez, Rafael, Iradi Casal, Antonio, Villegas García, José Antonio, Universitat de València - FISIOLOGIA, and Universitat de València. Departament de Fisiologia
- Subjects
lactacidemia ,child ,Facultad de Medicina ,anaerobic ,threshold ,soccer - Abstract
El objetivo principal es conocer la conducta del lactato en sangre.Situación bibliográfica.Estructurada en cinco apartados: reservas energéticas y límites metabólicos, la regulación ácido-base, el metabolismo del lactato, el umbral anaeróbico y las diferencias existentes entre niños y adultos. Nos centramos en los menores niveles de lacticemia en los niños, el mayor umbral anaeróbico en prepúberes frente a adultos y las diferencias de adaptación del metabolismo glucolítico.Material y métodos. Los criterios de selección de la población estudiada fueron: varones de 8-12 años, nivel socioeconómico medio, raza blanca, ausencia de limitaciones patológicas, volumen testicular menor o igual a 3 ml y la práctica del fútbol como actividad extraescolar. Utilizamos dos paquetes estadísticos: El BMDP y el SPSS 10.0. Realizamos una cineantropometría individual. Usamos para conocer la maduración ósea un método cuantitativo basado en el descrito por Tanner y Whitehouse. Hicimos dos pruebas en días diferentes. La primera prueba consistió en una cicloergometría triangular máxima. El umbral anaeróbico lo hallamos mediante la técnica V-Slope. Para la segunda prueba, cicloergometría rectangular submáxima, se escogió la carga correspondiente al umbral. Las extracciones capilares se obtuvieron sin detener la prueba. Realizamos una aproximación polinómica de la función lactato respecto al tiempo, a partir de los valores obtenidos.Resultados y conclusiones.Nuestros valores son similares a los obtenidos por Mocellin, Gildein y Billat, pero superiores a los de Williams. Considerando a nuestra muestra más estable, las cifras serían más acordes con las de Billat. Desafortunadamente, las diferencias en los procedimientos utilizados para definir el estadio estable, excluyen la comparación entre los diferentes estudios.1. En los sujetos estudiados, no se aprecia obesidad atendiendo al IMC y al cociente del perímetro cintura/cadera de la población seleccionada. El somatotipo medio obtenido es 3,7-5-2,7, es decir, endo-mesomorfo.2. La media del pico del consumo de oxígeno se ha establecido en 48,79 ml/Kg/min, siendo el valor en el umbral de 37,18 ml/Kg/min que equivale a un 76% del pico máximo.3. En el estudio multifactorial realizado, el 72,5% de toda la variabilidad es explicada por 5 grupos de factores, en el orden anotado a continuación: - Factor 1: Bicarbonato y presión parcial de dióxido de carbono.- Factor 2: Potencia.- Factor 3: Hemoglobina.- Factor 4: Lactatos, pH y bicarbonato.- Factor 5: Consumo de oxígeno, masa grasa, masa ósea y masa muscular.4. En la matriz de correlación del factor 4, los lactatos presentan correlaciones significativas con distintas variables entre las que destacamos la presencia del volumen testicular derecho. Esto implicaría una relación entre la madurez sexual y la concentración de lactatos.5. La variabilidad del pH, a los 2 minutos de realizar la prueba, en un 85,56% está en función de los factores lactato y bicarbonato.6. En la zona del umbral, transición aerobia-anaerobia, obtenida por nosotros, podemos hablar de unas cifras de lactato en las que se produce un cambio en el comportamiento de éste, previo a un estadio estable. Hablamos de unos valores de 3,57 ± 1,33 mmol·l-1.7. En la población en la que el comportamiento del lactato se estabiliza, con variación inferior a 1 mmol·l-1, el máximo estadio estable corresponde a unas cifras de 4,31 ± 1,08 mmol·l-1. En la subpoblación en la que el comportamiento del lactato se estabiliza, con variación inferior a 0,5 mmol·l-1, el máximo estadio estable corresponde a unas cifras de 3,78 ± 1,06 mmol·l-1. En esta subpoblación, el cambio en la conducta del lactato corresponde a la cifra de 3,63 ± 1,33 mmol·l-1. Estos valores, en esta subpoblación, nos indican una proximidad entre la modificación de un comportamiento ascendente del lactato y su posterior estabilización., It is generally accepted that children's response to exercise is different from that of adults: children have distinctly lower maximal anaerobic power than do adolescents and adults, the muscle metabolic profile is better equipped for oxidative than glycolytic energy generation and the blood lactate concentrations are lower in children than in adults.The purpose of this study was to know the responses of blood lactate in prepubescent boys.Thirty-two soccer players (mean age 10.6 years) were tested during two days with two weeks in between testing sessions.Before the exercise test a complete physical examination was performed. They had no overt manifestations of any disease. Anthropometric measurements, x-ray of the left hand and wrist and gonadal maturation (orchidometry) were determined.On the first test, each subject performed an incremental triangular exercise (until exhaustion) using a bicycle ergometer. Gas exchange was measured breath by breath. The anaerobic threshold (AT) obtained is called ventilatory threshold 2 of Skiner and McLellan.On the second experimental day, the protocol for the test consisted of loaded cycling 50 watts under the AT during 5 min and after loaded watts of AT. Blood samples were collected after 5 min and every 3 min during the rest of the test, without the boys stopped. On cessation of exercise, blood samples were collected after 2 and 5 min. Free-flowing capillary blood samples for lactate determination were collected from a prewarmed fingertip.For statiscal analysis the packages SPSS 10.0 and BMPD were used. The somatotype turned out to be 3.7-5-2.7. The mean VO2peak was 48,79 ml/Kg/min, and the VO2 at AT was 37,18 ml/Kg/min corresponding to 76% of VO2peak. When the maximal steady state blood lactate (MLSS) concentration was assumed with increase, during all submaximal exercise, lower than 1 mmol·l-1 the values were 4,31 ± 1,08 mmol·l-1. If the MLSS was assumed with an increase lower than 0,5 mmol·l-1, the values were 3,78 ± 1,06 mmol·l-1. Our results were similar to those of Mocellin, Gildein and Billat, but higher than those of Williams. But direct comparisons between authors should only be made where identical procedures have been used.
- Published
- 2004
31. Efectos agudos del enfrentamiento en judo: análisis multiparamétrico
- Author
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Fernández, Eduardo Carballeira, Iglesias, E., Fernández, Eduardo Carballeira, and Iglesias, E.
- Abstract
The purpose of this study was to characterize the effort in judo, through quantification of changes induced by a fight on neuromuscular and metabolic aspects. In a sample of 8 male judo fighters, members of the Senior Galician Selection (Spain), heart rate (Fc) was recorded during a judo match. Before and immediately after the fight lactate blood concentration, countermovement jump, isometric handgrip dinamometry and performance in isometric bench press 90º, rowing 90º and squat 160º were measured. Fc represented 92.65±3.26% of the maximum (%Fcmáx.) reaching lactate concentration levels of 13.75±3.09 mmol/L. Results decreased around 5% in isometric handgrip dinamometry. Performance decreased in bench press and rowing exercises, reaching statistical significance in rowing exercise for peak force (PFI) and average force (MFI) (postest 93.93±6.20% and 91.60±9.47% of pretest for PFI and MFI respectively). Isometric changes for lower limbs were less marked than for higher limbs., El propósito del presente estudio fue caracterizar el esfuerzo de judo, mediante la cuantificación de cambios inducidos por un combate sobre aspectos metabólicos y neuromusculares. En una muestra de 8 judocas masculinos pertenecientes a la Selección Gallega Senior, se registró la frecuencia cardíaca (Fc) durante un enfrentamiento. Antes e inmediatamente después del combate se midieron lactacidemia, salto con contramovimiento, dinamometría manual y rendimiento isométrico en press banca 90º, remo 90º y sentadilla 160º. Fc se situó en el 92,65±3,26% de la máxima (%Fcmáx.) alcanzando la lactacidemia niveles de 13,75±3,09 mmol/L. Descendió aproximadamente un 5% el resultado en dinamometría manual. El rendimiento en los ejercicios de remo y press banca disminuyó, alcanzando significación estadística en éste último para el valor pico (PFI) y medio (MFI) (postest 93,93±6,20% y 91,60±9,47% respecto al pretest para PFI y MFI respectivamente). Se apreciaron diferencias entre las modificaciones del rendimiento isométrico del miembro inferior y superior, siendo este último menos afectado.
- Published
- 2007
32. Efectos agudos del enfrentamiento en judo: análisis multiparamétrico
- Author
-
Carballeira, Eduardo, Iglesias-Soler, Eliseo, Carballeira, Eduardo, and Iglesias-Soler, Eliseo
- Abstract
[Resumen]: El propósito del presente estudio fue caracterizar el esfuerzo de judo, mediante la cuantificación de cambios inducidos por un combate sobre aspectos metabólicos y neuromusculares. En una muestra de 8 judocas masculinos pertenecientes a la Selección Gallega Senior, se registró la frecuencia cardíaca (Fc) durante un enfrentamiento. Antes e inmediatamente después del combate se midieron lactacidemia, salto con contramovimiento, dinamometría manual y rendimiento isométrico en press banca 90º, remo 90º y sentadilla 160º. Fc se situó en el 92,65±3,26% de la máxima (%Fcmáx.) alcanzando la lactacidemia niveles de 13,75±3,09 mmol/L. Descendió aproximadamente un 5% el resultado en dinamometría manual. El rendimiento en los ejercicios de remo y press banca disminuyó, alcanzando significación estadística en éste último para el valor pico (PFI) y medio (MFI) (postest 93,93±6,20% y 91,60±9,47% respecto al pretest para PFI y MFI respectivamente). Se apreciaron diferencias entre las modificaciones del rendimiento isométrico del miembro inferior y superior, siendo este último menos afectado., [Abstract]: The purpose of this study was to characterize the effort in judo, through quantification of changes induced by a fight on neuromuscular and metabolic aspects. In a sample of 8 male judo fighters, members of the Senior Galician Selection (Spain), heart rate (Fc) was recorded during a judo match. Before and immediately after the fight lactate blood concentration, countermovement jump, isometric handgrip dinamometry and performance in isometric bench press 90º, rowing 90º and squat 160º were measured. Fc represented 92.65±3.26% of the maximum (%Fcmáx.) reaching lactate concentration levels of 13.75±3.09 mmol/L. Results decreased around 5% in isometric handgrip dinamometry. Performance decreased in bench press and rowing exercises, reaching statistical significance in rowing exercise for peak force (PFI) and average force (MFI) (postest 93.93±6.20% and 91.60±9.47% of pretest for PFI and MFI respectively). Isometric changes for lower limbs were less marked than for higher limbs.
- Published
- 2007
33. Acidose lactique sous metformine, un risque à ne pas négliger.
- Author
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Pillon, François and Buxeraud, Jacques
- Abstract
Copyright of Actualités Pharmaceutiques is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
- Full Text
- View/download PDF
34. Blood Gas and Acid-Base Status of Conscious Pigs Subjected to Fixed- Volume Hemorrhage and Resuscitated with Hypertonic Saline Dextran
- Author
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LETTERMAN ARMY INST OF RESEARCH PRESIDIO OF SAN FRANCISCO CA, Hannon, John P., Wade, Charles E., Bossone, Carol A., Hunt, Marjorie M., Coppes, Robert I., LETTERMAN ARMY INST OF RESEARCH PRESIDIO OF SAN FRANCISCO CA, Hannon, John P., Wade, Charles E., Bossone, Carol A., Hunt, Marjorie M., and Coppes, Robert I.
- Abstract
Reprint: Blood Gas and Acid-Base Status of Conscious Pigs Subjected to Fixed-Volume Hemorrhage and Resuscitated with Hypertonic Saline Dextran., Availability: Pub. in Circulatory Shock, v32 p19-29 1990.
- Published
- 1990
35. Hyperlactatämie bei Darmischämie: I. Theoretische überlegungen
- Author
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Nutz, V. and Sommer, H. J.
- Published
- 1987
- Full Text
- View/download PDF
36. Hyperlactatämie bei Darmischämie: II. Experimentelle grundlagen
- Author
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Nutz, V., Sommer, H. -J., and Schultze-Petzold, J.
- Published
- 1987
- Full Text
- View/download PDF
37. The lactate level as an indicator of the severity of the condition after massive blood loss
- Author
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Zaks, I. O. and Ivleva, V. V.
- Published
- 1975
- Full Text
- View/download PDF
38. Fisiología del fútbol: revisión bibliográfica
- Author
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Sanuy Bescos, Xavier, Peirau i Terés, Xavier, Biosca Estela, Paco, and Perdrix Ecequiel, Rocío
- Subjects
Lactacidemia ,Frecuencia cardíaca ,Fútbol ,Fisiología - Abstract
Presentamos una revisión de diversos trabajos en los que se abordó el estudio de las demandas fisiológicas del fútbol a partir de diversos indicadores. Se analizan dos indicadores externos, la distancia total recorrida por los jugadores en un partido de fútbol y su intensidad, y dos indicadores internos, frecuencia cardíaca y nivel de lactato en sangre. A partir de los resultados hallados por los diferentes autores se intenta definir qué papel juegan las distintas vías energéticas durante un partido de fútbol.
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