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A carnosina é um dipeptídeo com diversas ações fisiológica, destacando-se em sua capacidade de tamponamento intracelular. Ela é sintetizada in situ a partir dos aminoácidos L-histidina e beta-alanina (BA) e o aumento da concentração de carnosina muscular causado por meio da suplementação de BA é amplamente conhecido. No entanto, a relação entre a resposta aguda de beta-alanina, e as proteínas e genes relacionados ao metabolismo da carnosina após a suplementação de BA aguda e crônica e sua relação com alterações crônicas no conteúdo de carnosina muscular não são totalmente compreendidas. O objetivo desse estudo foi avaliar as respostas agudas à suplementação de BA na concentração plasmática de BA, na expressão de genes relacionados ao metabolismo da carnosina e no seu respectivo conteúdo no músculo esquelético, antes e depois da suplementação crônica de BA. Foram recrutados quatorze homens saudáveis e fisicamente ativos (participavam de exercícios físicos semanalmente, porém, não eram envolvidos em um programa de treinamento estruturado) com idade entre 18 e 45 anos, estes foram submetidos à suplementação aguda de 1600 mg de BA antes e após um período de suplementação crônica de 6400 mg/dia durante 4 semanas. Amostras musculares foram coletadas antes e depois do período de suplementação para se avaliar expressão e conteúdo de proteínas e genes relacionados ao metabolismo da carnosina. A análise desses parâmetros auxiliará no entendimento do metabolismo da carnosina e na determinação de diretrizes de suplementação mais individualizadas e eficientes.

O Judô é um esporte de característica intermitente, onde o atleta realiza grandes esforços em um curto período de tempo. Por isto, as fibras musculares utilizadas durante a prática esportiva são as fibras do tipo dois, que utilizam como fonte de energia a glicose, que por sua vez, acaba resultando em um acúmulo de lactato na corrente sanguínea dos atletas, fazendo com que o metaborreflexo inspiratório seja ativado e que o atleta entre em fadiga muscular periférica. O objetivo deste estudo é analisar os efeitos do treinamento muscular inspiratório em atletas de Judô. Foi avaliada a força muscular respiratória através da pressão inspiratória máxima, da pressão expiratória máxima e da capacidade física dos atletas através do Special Judo Fitness Test. Participaram, deste estudo, nove atletas, com média de 21,6 anos. Foi observado que no momento pré-treinamento os atletas apresentaram uma diminuição da força muscular respiratória, e um índice de classificação de 13,0. Após o treinamento, observou-se uma melhora significativa da força muscular respiratória e melhor índice de classificação do teste da capacidade física, para 11,9. Desta forma o treinamento muscular inspiratório se ostra benéfico para atletas de Judô, melhorando sua força respiratória e sua capacidade física.

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Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Ciência e Movimento: RBCM is the property of Revista Brasileira de Ciencia e Movimento 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Copyright of Revista Brasileira de Prescrição e Fisiologia do Exercício is the property of Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercicio 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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Introdução: O futebol é um esporte conhecido mundialmente, envolve exercí­cios intermitentes e de alta intensidade. O organismo dos atletas, pode entrar em acidose metabólica quando o gasto energético for maior que a oferta, situação em que se acumula hidrogênio, reduzindo o rendimento. O bicarbonato de sódio (NaHCO3) tem função extracelular, tamponante de í­ons hidrogênio, atenuando ou inibindo a acidificação. Já a beta alanina é fonte precursora de carnosina, substância tamponante da acidose muscular. Ambas as substâncias promovem ganho de performance pela redução da fadiga. Objetivo: investigar os efeitos do NaHCO3 e Beta alanina na performance de jogadores de futebol. Materiais e métodos: trata-se de um ensaio clí­nico randomizado. Os atletas foram divididos em três grupos, onde um recebeu placebo, o segundo 0,3g de NaHCO3/Kg de peso e o terceiro grupo 0,6g de beta alanina, ingeriram no pré-treino diluí­do em suco tang, em garrafas individuais, 40 minutos antes do teste (Yo-Yo Intermittent Recovery Test). Todos os atletas foram submetidos aos três protocolos em dias alternados. Resultados: participaram do estudo 14 jogadores com idade média de 19,21±0,70 anos, peso médio 71,4 ±6,6 Kg, e estatura entre 1,73 ±0,07m, o IMC médio foi de 23,8 ±1,56 kg/m2. A média de distância percorrida para os grupos foi de 2695,7 ±620,8m, 2740,7 ±528,2m, 2764,3 ±632,6 m para placebo, NaHCO3, e beta alanina respectivamente. A suplementação com beta alanina causou mais desconfortos nos atletas. Conclusão: não se constatou diferenças significativas quanto à distância percorrida pelos jogadores, na comparação dos suplementos utilizados.

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Copyright of Journal of Physiotherapy Research / Revista Pesquisa em Fisioterapia is the property of Journal of Physiotherapy Research / Revista Pesquisa em Fisioterapia 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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Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

RESUMO Objetivo comparar os efeitos imediatos da fotobiomodulação com laser nos comprimentos de onda 660 nm e 808 nm na fadiga do músculo orbicular da boca. Métodos trata-se de um estudo experimental randomizado, com 60 mulheres, com idade entre 19 e 43 anos. As participantes foram divididas em quatro grupos. O grupo GV recebeu irradiação com laser de comprimento de onda de 660 nm em quatro pontos do orbicular da boca; o grupo GIV recebeu irradiação com laser de comprimento de onda de 808 nm nos mesmos pontos; o grupo controle não recebeu irradiação e o grupo placebo passou pelos mesmos procedimentos dos grupos GV e GIV, porém o equipamento não foi acionado. A irradiação foi realizada com laser de 100 mW de potência, 4 J de energia por ponto e 133,3 J/cm2 de fluência. Avaliação eletromiográfica foi realizada antes e após a irradiação, concomitantemente ao exercício de protrusão labial sustentada até a sensação de fadiga. O índice de fadiga eletromiográfica foi calculado a partir da frequência mediana. A amplitude do sinal foi avaliada, examinando o RMS, e os valores normalizados pelo pico. A diferença na amplitude entre lábios superiores e inferiores também foi analisada. Todas as variáveis foram comparadas antes e após a irradiação. Resultados não foram encontradas diferenças significativas nas medidas antes e após a irradiação. Conclusão a fotobiomodulação, com os parâmetros investigados neste estudo, não resultou em efeitos imediatos sobre a fadiga do músculo orbicular da boca.

RESUMO Objetivo Investigar a fadiga vocal e sua relação com a sensação de esforço fonatório e desconforto no trato vocal de professores após uma semana de atividade letiva. Método Estudo transversal, quantitativo, participando 40 professores com queixas de fadiga vocal. Procedimentos realizados no começo e final da semana, antes do início das aulas: Índice de Fadiga Vocal–IFV, Escala Borg, Escala de Desconforto do Trato Vocal–EDTV e registro de voz para análise perceptivo-auditiva. Resultados Não houve mudanças no esforço fonatório e na frequência e intensidade do desconforto no trato vocal. Em relação ao IFV, nos domínios fadiga e limitação vocal e desconforto físico associado à voz, os professores iniciaram e terminaram a semana com valores compatíveis aos dos disfônicos. No domínio restrição vocal iniciaram a semana com valores compatíveis aos dos indivíduos vocalmente saudáveis e no final da semana tiveram escores compatíveis aos dos disfônicos. Na recuperação com repouso vocal os valores pré e pós foram abaixo da nota de corte, significando menor recuperação vocal. Quanto maior é a sensação de fadiga vocal, maior é a percepção de esforço fonatório; mais frequente é a sensação de aperto, secura, garganta dolorida, sensível e irritada, e mais intensas as sensações de desconforto no trato vocal: aperto, secura, coceira, garganta sensível e irritada. Conclusão Professores percebem aumento de fadiga vocal, sem mudanças no esforço fonatório e desconforto de trato vocal após uma semana de aula. Quanto maior é a percepção de fadiga vocal, maior é a sensação de esforço e desconforto fonatório.

O objetivo deste trabalho foi analisar em praticantes de musculação (n=20) os estimadores de fadiga eletromiográficos durante o treinamento resistido, avaliado com diferentes intervalos de séries. Os protocolos foram realizados na Escola de Treinamento Resistido e Laboratório de Fisiologia do Movimento do UNIPÊ, sendo coletados os valores de: massa corporal, estatura, carga máxima (1RM), valor RMS e frequência mediana (fmed) do eletromiograma (EMG). Foram avaliados os músculos: quadríceps femoral (vasto lateral- VL), na cadeira extensora e; bíceps braquial (BB), na rosca Scott. Os testes foram executados com 80% de 1RM. Entre as séries, foram avaliados três diferentes intervalos de recuperação: 30, 60 e 90s, com, no mínimo, 48 horas de intervalos entre cada avaliação. A análise do EMG exibiu que o BB, mostrou-se indiferente quanto à variação dos estimadores de fadiga (valor RMS e fmed) quando avaliado sob os três intervalos de recuperação, ou seja, os estimadores variaram na mesma proporção em todas as avaliações. Enquanto para o VL, a avaliação realizada com um intervalo de 30s exibiu uma magnitude de variação dos estimadores significativamente maior (p

Introdução e objetivo: A proposta do presente estudo foi analisar a influência da ordem dos exercícios sobre o número de repetições e volume total no método tri-set. Materiais e métodos: Trata-se de uma pesquisa com delineamento cruzado (cross-over) e randomizado. A amostra foi composta por 13 sujeitos (23,77 ± 5,54 anos; 78,70 ± 12,55 kg) praticantes de treinamento resistido de maneira ininterrupta por no mínimo seis meses antecedentes à realização do estudo. Os voluntários foram submetidos a duas sessões experimentais realizadas em diferentes ordens de exercícios para musculatura dorsal: sequência A: puxada costas, remada sentada e crucifixo invertido; sequência B: crucifixo invertido, remada sentada e puxada costas. As sessões foram realizadas a uma intensidade de 75% de 1RM e cada sessão obedeceu ao intervalo mínimo de 48 horas. A percepção subjetiva de esforço foi avaliada por meio da escala proposta por Borg. Resultados: Foi observado um número total de repetições superior para a sequência B (82,30 ± 13,11 vs rep 73,61 ± 11,00 rep; p = 0,004). Não houve diferença estatística entre as sequências quando comparados o volume total e percepção subjetiva de esforço. Conclusão: Os resultados do presente estudo demonstraram que, no método de treinamento tri-set, a inserção de um exercício monoarticular para o grupo muscular dorsal no início da sessão pode proporcionar um número significativamente maior no total de repetições, entretanto, o volume total se mostrou semelhante em ambas as sessões experimentais. ABSTRACT Exercise order manipulation does not influence total volume during resistance training session in the method tri-set Introduction and objective: The purpose of this study was to analyze the influence of exercise order on the number of repetitions and total volume in the method tri-set. Materials and methods: It is a research with cross-randomized design. The sample was composed of 13 subjects (23.77 ± 5.54 years, 78.70 ± 12.55 kg) of resistance-training practitioner’s uninterrupted manner for at least six months background to the study. The volunteers underwent two experimental sessions in different orders to exercise dorsal muscles: The sequence: pulled back, seated row and inverted crucifix; Sequence B: inverted crucifix, seated row and pulled back. The sessions were performed at an intensity of 75% of 1RM and each session followed the minimum interval of 48 hours. The perceived exertion was evaluated using the scale proposed by Borg. Results: Significantly higher result were observed in the total number of repetitions for the sequence B (82.30 ± 13.11 vs rep 73.61 ± 11.00 rep; p = 0.004). There were no significant differences between the conditions when comparing the total volume and perceived exertion. Conclusion: The results of the present study demonstrated in the tri-set training method, the insertion of a single-joint exercise for the dorsal muscle group at the beginning of the session could provide significantly more total repetitions, however, total volume proved similar in both experimental sessions.

É crescente a utilização dos vários métodos no treinamento resistido. Um dos métodos que vem despertando interesse científico é o método das repetições parciais. Neste tipo de treinamento, após atingir a falha voluntária concêntrica, os indivíduos realizam repetições com menor amplitude articular. A pesquisa teve como objetivo avaliar a influência do presente método no aumento de força e resistência muscular localizada, sendo um estudo clínico randomizado controlado de cegamento duplo, de finalidade comparativa sobre aspectos quantitativos baseados nos resultados de dois testes. A amostra foi composta por 20 indivíduos fisicamente ativos, sorteados em 2 grupos, (A e B) contendo 10 indivíduos cada, que foram submetidos à 4 semanas de treinamento resistido. O grupo B utilizou o método de repetições parciais, enquanto o grupo A utilizou os movimentos com amplitude total sessadas após a falha concêntrica. Os dados foram coletados através de 2 testes, o teste de resistência muscular localizada para membros superiores (flexão de braço) e arremesso de Medicine Ball antes e após as 4 semanas de treinamento, sendo analisados estatisticamente pelo teste T de Student após esse período. Houve diferença significativa para arremesso de Medicine Ball, porém não houve melhora em resistência muscular. Ao final concluiu-se que o método de repetições parciais promoveu melhora no arremesso de Medicine Ball, podendo ser associado à força, mas não em resistência muscular para membros superiores. ABSTRACT The influence of partial range of motion repetitions, following momentary concentric failure, on increased strength and muscular resistance in physically active individuals The use of various methods in resistance training is increasing. One of the methods that has aroused scientific interest is the methods of partial range of motion repetitions. In this type of training, after reaching concentric voluntary failure, individuals perform repetitions with less joint amplitude. The aim of the study was to evaluate the influence of the present method on the increase of strength and localized muscular resistance, being a randomized controlled clinical study of double blind, comparative purpose on quantitative aspects based on the results of two tests. The sample consisted of 20 physically active individuals, drawn in 2 groups, (A and B) containing 10 individuals each, who were submitted to 4 weeks of resistance training. Group B used the partial range of motion repetitions method, while group A used the full-amplitude movements after the concentric failure. The data were collected through 2 tests, the muscle resistance test located for upper limbs (arm flexion) and Medicine Ball throw before and after the 4 weeks of training, being analyzed statistically by Student's T test after this period. There was a significant difference for throwing Medicine Ball, but there was no improvement in muscular endurance. At the end, it was concluded that the partial range of motion repetitions method promoted improvement in the throwing of Medicine Ball, being able to be associated with strength, but not in muscle resistance for upper limbs.

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Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Introduction: Muscle fatigue is defined as the inability to maintain muscle contraction and it is caused by biochemical changes that modify the mechanics of muscle contraction, resulting in reduced athletic performance. The aim of this study was to evaluate the myoelectric behavior and strength of healthy individuals during the fatigue of the biceps brachii muscle. Methods: The study was composed of 13 male volunteers aged between 20 and 30 years (25 ± 3.7). For the induction of muscle fatigue, three Maximum Voluntary Isometric Contractions (MVIC) were performed with duration of 50 seconds and a 50-second interval, using a computerized dynamometer coupled to a surface electromyograph. During MVIC, the electromyographic signal and the strength were evaluated. Results: It was possible to observe in the results a decrease in muscle strength and in the mean and median frequencies of the myoelectric signal during muscle fatigue. From the linear regression of the data obtained by electromyography and dynamometry, it was possible to obtain the slope of the line for each test (Test 1, Test 2 and Test 3). It is noted that there was a drop in all parameters evaluated by surface electromyography and muscle strength; nevertheless, there was no statistical difference between the tests, demonstrating similarity in signal behavior between the tests. Conclusions: It is concluded, therefore, that the electromyographic parameters analyzed (mean frequency, median frequency and RMS) and strength show a decrease during muscle fatigue induced by MVIC. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the strength of respiratory muscles and to compare maximum inspiratory (MIP) and expiratory (MEP) pressure and MEP/MIP ratio between patients with chronic respiratory diseases and healthy individuals. Methods: Case-control study. Individuals with neuromuscular disease and post-infectious bronchiolitis obliterans were considered. In addition, they were also matched according to anthropometric and demographic characteristics with healthy children and adolescents. MIP, MEP in the three groups, and pulmonary function only in patients with chronic respiratory diseases were recorded. Results: A total of 52 subjects with CRD (25 with neuromuscular disease, and 27 with post-infectious bronchiolitis obliterans) and 85 healthy individuals were included, with an average age of 11.3±2.1 years. Patients with neuromuscular disease and post‑infectious bronchiolitis obliterans presented lower MIP and MEP when compared with healthy individuals, although MEP/MIP ratio was lower in patients with neuromuscular disease (0.87±0.3) and higher in patients with post-infectious bronchiolitis obliterans (1.1±0.3) compared to the healthy group (0.97±0.2). Only in patients with neuromuscular disease a negative correlation was observed between MEP/MIP ratio and age (r=-0.50; p=0.01). Conclusions: Differences in the pattern of muscular weakness between patients with chronic respiratory diseases were observed. In patients with neuromuscular disease, a decrease in the MEP/MIP ratio depending on MIP was verified; and in those patients with post-infectious bronchiolitis obliterans, an increase in the MEP/MIP ratio depending on MIP was also observed. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Introdução: Nos últimos anos, o tratamento do câncer evoluiu, possibilitando uma maior sobrevida ao paciente, porém os efeitos colaterais, como a diminuição da imunidade e a fadiga, influenciam o sistema respiratório e muscular. Objetivo: Analisar a fadiga e as forças musculares respiratória e periférica em voluntários com câncer em tratamento e em indivíduos saudáveis. Método: Trata-se de um estudo analítico, observacional, transversal e controlado. Os indivíduos foram distribuídos em dois grupos: um grupo de câncer em quimioterapia e/ou em radioterapia (GCA: n=98; homens=35,72%; mulheres=64,28%; idade=58,13±13,26 anos; índice de massa corporal (IMC=26,23±4,04 kg/m2; tempo de diagnóstico de câncer=27,54±9,61 meses) e um grupo controle (GC: n=86; homens=30,23%; mulheres=69,77; idade=59,24±12,87 anos; IMC=26,76±4,04 kg/m2). Para todos os indivíduos, a fadiga relatada foi avaliada, usando-se a subescala de fadiga do questionário The Functional Assessment of Cancer Therapy-Fatigue (FACT-F). A avaliação das pressões respiratórias máximas foi realizada por meio da manovacuometria e da força de preensão palmar por intermédio da dinamometria manual. Resultados: O GCA apresentou maior índice de fadiga relatada (p

O objetivo do presente estudo foi analisar a influência da velocidade de execução na percepção subjetiva de esforço (PSE) e o volume de repetições em diferentes velocidades. Métodos: A amostra foi composta por 10 voluntários do sexo masculino (23,4 ± 5,4 anos), com no mínimo 6 meses de experiência no treinamento de força. Os participantes realizaram 8 séries de até 8 repetições com intensidade de 60% de 1RM em diferentes velocidades de execução de movimento: cadência lenta (6020), cadência moderada (2020) e cadência livre. Foram avaliadas a PSE (escala OMNI-RES) e o volume de repetição executadas em cada condição. Resultados: O número de repetições executadas nos protocolos de cadência lenta e moderada foi menor quando comparada ao protocolo livre (p < 0,05) a partir da 2ª e 6ª séries, respectivamente. A PSE no protocolo de cadência lenta foi maior quando comparado com as outras cadências (p

OBJECTIVE: Define the correlation between the rating of perceived exertion (RPE) and the power of the lower limbs before and after training in soccer athletes. METHODS: Were monitored 14 soccer athletes (under 17 years old) over four training sessions. With the following characteristics: height (173±6.81cm), weight (64.43±5.80kg) and fat percentage (14.74±3.11). RPE was monitored through the e-trimp app, 15 minutes after the end of each training session. Jumps were evaluated through the Jump System Pro jumping platform, 10 minutes before and after the training sessions. Data was analyzed in the SPSS statistical program using descriptive statistics and Spearman correlation. RESULTS: The correlation between the RPE and the difference of the relative power of the vertical jump test (pre/post training) was weak for all the sessions. Sessions 1 and 4 presented a negative correlation (r=-0.184, p=0.530; r=-0.159, p=0.587). Sessions 2 and 3 showed a positive correlation (r=0.010, p=0.973; r=0.373, p=0.188), respectively. CONCLUSION: There were no statistically significant correlations between the RPE and the relative jumping power in the evaluated athletes. [ABSTRACT FROM AUTHOR]

In general, different training practice times may be associated with altered neuromuscular response in athletes during periods of acute fatigue and in response to post-effort recovery methods. The present investigation was purposed to analyze the electromyographic performance of knee extensor muscles after fatigue and cold-water immersion in university athletes with different practice times. Participants (n=24) were divided into two groups according to practical experience: G1 (6.60±0.70 years) and G2 (11.57±0.44 years); electromyography procedures were performed during an isometric knee extensor exercise. There were no differences in the comparisons between groups (p>0.05). Considering the moment of analysis, root mean square (RMS) measurements of the vastus lateralis and vastus medialis muscle were higher at the post-cryotherapy moment, when compared to the initial and post-exhaustion moments (p<0.001). No changes were observed in relation to muscle strength. In conclusion, neuromuscular performance of knee extensor muscles was not affected by the history of sports practice in university athletes. [ABSTRACT FROM AUTHOR]

Objective: This article aimed to analyze the response of the spastic muscle of the upper limbs of hemiparetic individuals, in relation to muscle performance and range of motion, after treatment with robotic therapy. Methodology: the sample consisted of 12 healthy volunteers (Control Group) and 15 post-stroke volunteers (Intervention Group). Both groups underwent an evaluation protocol that consisted in data collection based on the evaluation of fatigue and peripheral muscle strength: blood collection for the baseline measurement of blood lactate; torque measurement (Isokinetic Dynamometer); blood collection for the final measurement of blood lactate; and functional evaluation of the elbow flexion and extension movements with the aid of the kinematic camera. The Intervention Group performed 10 sessions of robotic therapy on the ArmeoSpring® exoskeleton, and after the treatment, the reevaluation was performed. Results: after the treatment, the Intervention Group presented increased range of motion, increased muscle torque and decreased lactate concentration after a maximal voluntary contraction. Conclusion: robotic therapy was a safe and effective tool to improve the performance of the paretic limb of the individuals who participated in this study. [ABSTRACT FROM AUTHOR]

Copyright of Bioscience Journal is the property of Bioscience Journal 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.)

The objective of the present study was to analyze the influence of execution velocity on rating of perceived exertion (RPE) and on volume of repetitions at different velocities. Methods: The sample consisted of 10 male volunteers (23.4 ± 5.4 years old) with at least 6 months of experience in strength training. The participants performed 8 sets of up to 8 repetitions with an intensity of 60% of 1RM at different velocities of movement execution: slow cadence (6020), moderate cadence (2020) and free cadence. RPE (OMNI-RPE scale) and volume of repetitions performed in each condition were assessed. Results: The number of repetitions executed in the slow- and moderate-cadence protocols was smaller compared to that in the free protocol (p <0.05), as of the 2nd and 6th sets, respectively. RPE in the slow-cadence protocol was higher compared to that in the other cadences (p <0.05). Conclusion: The slow- and moderate-cadence protocols significantly reduce the number of repetitions performed and result in a greater rating of perceived exertion in comparison with free cadence. [ABSTRACT FROM AUTHOR]

Copaifera reticulata Ducke is a medicinal plants greatly employed in northern and northeastern Brazil. However, skin penetration is difficult when it is applied in natura. However, permeability increases through nanoformulations and phonophoresis and low frequency ultrasound that increases skin permeability of compounds. The effect of oil-resin of copaiba, in natura and in gel (nano-emulsion), associated to phonophoresis, was analyzed and compared for muscle repair in Wistar rats. Copaiba nano-emulsion was formulated by phase inversion. It was incorporated to hydrogel Carbopol® (20% nano-emulsion, 80% Carbopol®). Male animals (n=24) were divided into six groups and later underwent traumatic lesion of the gastrocnemius muscle. Muscle repair was analyzed by plasmatic dosage of aspartate aminotransferase (AST) and kinase creatine (CK). Results show that topic treatments with oil-resin, associated with phonophoresis and nanogel were efficient in the assay for the repair of skeleton muscles. [ABSTRACT FROM AUTHOR]

Copyright of Revista Andaluza de Medicina del Deporte is the property of Centro Andaluza de Medicina del Deporte 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.)

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. 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.)

Introduction: the use of various methods in weathered training is increasing. One of the methods that has aroused scientific interest is the method of partial repetitions. In this type of training, after reaching concentric voluntary failure, individuals perform repetitions with less joint amplitude. Objective: to evaluate the influence of the present method on the increase of strength and localized muscular resistance. Methods: randomized controlled double blind, comparative study on quantitative aspects based on the results of two tests. The sample consisted of 20 physically active individuals, drawn in 2 groups, (A and B) containing 10 individuals each, who were submitted to 4 weeks of resistance training. Group B used the partial repeats method, while group A used the fullamplitude movements after the concentric failure. The data were collected through 2 tests, the test of muscular resistance located for upper limbs (arm flexion) and throwing of Medicine Ballantes and after the 4 weeks of training, being analyzed statistically by Student's T test after this period. Results: there was a significant difference for throwing Medicine Ball, but there was no improvement in muscular endurance. Conclusion: the partial repetition method promoted improvement in the throwing of Medicine Ball, being able to be associated with strength, but not in muscle resistance for upper limbs. [ABSTRACT FROM AUTHOR]