11 results on '"Knihs, Débora Aparecida"'
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2. APTID?O F?SICA E ?NDICES DE ADIPOSIDADE EM POLICIAIS MILITARES
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Knihs, Débora Aparecida, Zimmermann, Haiko Bruno, dal Pupo, Juliano, and Reis, Luiz Francisco
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- 2023
3. INDICES DE ADIPOSIDADE E SOMATOTIPIA DE POLICIAIS MILITARES DE BLUMENAU-SC/Adiposity and somatotipy indices of military police of Blumenau-SC
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Reis, Luiz Francisco, Knihs, Débora Aparecida, and Luzzani, Fernanda
- Published
- 2019
4. Magnitude and direction of elbow torque asymmetries in manual wheelchair users
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Biduski, Grazieli Maria, primary, Knihs, Débora Aparecida, additional, Nery de Oliveira, Silas, additional, Hoinaski, Laís Peixoto, additional, Rossato, Mateus, additional, and Freitas, Cíntia De La Rocha, additional
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- 2023
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5. Muscle power and muscle hypertrophy of the lower limbs among practitioners of functional fitness training and strength training
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de Oliveira, Silas Nery, primary, Zapello, Grazieli Maria Biduski, additional, Knihs, Débora Aparecida, additional, Fischer, Gabriela, additional, and Moro, Antônio Renato Pereira, additional
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- 2023
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6. Effects of Different Levels of Fatigue on Vertical Jump Performance, Vertical Stiffness, and Intralimb Coordination.
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Knihs, Débora Aparecida, Dias, Jonathan Ache, and Pupo, Juliano Dal
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MUSCLE fatigue ,VERTICAL jump ,BIOMECHANICS - Abstract
This study aimed to investigate the acute effects of different levels of muscular fatigue on vertical jump performance, vertical stiffness, and intralimb coordination. Seventeen physically active men performed two fatigue protocols (low volume and high volume) composed of continuous vertical jumps on separate weeks. Jump height, vertical stiffness, and intralimb coordination were measured during countermovement vertical jumps prior to and immediately following the fatigue protocols. The jumps were performed on a force plate and filmed with high-speed cameras. The continuous relative phase was calculated as a measure of intralimb coordination. Mixed-model ANOVA was used to compare the variables between conditions and times. The fatigue index was greater in the high-volume protocol (27±12%) than in the low-volume protocol (16±7%). Jump height decreased (p=0.01) after the high-volume protocol. Vertical stiffness decreased (p=0.05), and the continuous relative phase of thigh-shank coupling in the ascent phase of countermovement jumps increased (p=0.04) after both protocols. In conclusion, jump performance was only affected by higher fatigue indexes, while vertical stiffness and intralimb coordination were affected similarly irrespective of the fatigue levels. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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7. Acute and Delayed Effects of Fatigue on Ground Reaction Force, Lower Limb Stiffness and Coordination Asymmetries During a Landing Task.
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Knihs, Débora Aparecida, Zimmermann, Haiko Bruno, and Pupo, Juliano Dal
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LEG ,FATIGUE (Physiology) ,REGRESSION analysis ,ACCIDENTS ,PHYSICAL activity - Abstract
Landing is a critical phase of movement for injury occurrence, in which lower limbs should be used equally to better absorb the shock. However, it has been suggested that fatigue can lead to the appearance of asymmetries. The aim of this study was to verify the acute and delayed effects of fatigue on the lower limb asymmetry indexes of peak ground reaction force, leg stiffness and intra-limb coordination during a landing task. Fifteen physically active men performed a fatigue protocol composed of 14 sets of 10 continuous vertical jumps, with a one-minute rest interval between the sets. A step-off landing task was performed before, immediately after, 24 h and 48 h after the fatigue protocol. Two force plates and a video analysis system were used. The symmetry index equation provided the asymmetry indexes. For statistical analysis, ANOVA and effect size analysis were utilized. Inferential statistics did not show the effect of fatigue in the asymmetry indexes for any variable or condition (p >.05). Moderate effect sizes were observed for peak ground reaction force (0.61) and leg stiffness (0.61) immediately after the application of the protocol. In conclusion, fatigue does not seem to significantly change the asymmetries of lower limbs, especially regarding intra-limb coordination. The moderate effects observed for peak ground reaction force and leg stiffness asymmetries suggest that these variables may be acutely affected by fatigue. [ABSTRACT FROM AUTHOR]
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- 2021
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8. Efeitos agudos e subagudos da fadiga induzida por diferentes cargas de trabalho sobre a simetria da rigidez e da coordenação no salto vertical
- Author
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Knihs, Débora Aparecida, Universidade Federal de Santa Catarina, and Dal Pupo, Juliano
- Subjects
Educação física ,Assimetria ,Membros inferiores ,Fadiga muscular ,Biomecânica - Abstract
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Desportos, Programa de Pós-Graduação em Educação Física, Florianópolis, 2019 A fadiga muscular pode causar alterações biomecânicas no movimento. Diante da sugestão de que esta poderia acentuar ou mesmo provocar assimetrias entre os membros inferiores, questionou-se se a fadiga muscular poderia afetar parâmetros ligados ao controle de movimento dos saltos verticais, como a rigidez de membros inferiores e a coordenação intrasegmentar. Além disso, indagou-se quanto aos efeitos da fadiga muscular aguda e subaguda induzida por diferentes volumes de exercício. Assim, o objetivo geral do presente estudo foi verificar os efeitos agudos e subagudos da fadiga muscular induzida por exercícios envolvendo saltos verticais, com diferentes cargas de trabalho sobre a simetria da rigidez de membros inferiores e da coordenação intrasegmentar durante o salto vertical. Participaram do estudo 17 homens adultos, fisicamente ativos, que foram submetidos a realização de dois protocolos de fadiga (PA 7x10 saltos; PB 14x10 saltos), em que fora quantificado o índice de fadiga e a dor muscular tardia. Os protocolos foram realizados com uma semana de intervalo entre eles. Foram realizadas avaliações do salto vertical com contra movimento (CMJ) e do step-off landing (STL) antes, logo após, 24h e 48h após cada protocolo de fadiga. Foram mensuradas as variáveis de desempenho do salto vertical (altura, impulso e potência), rigidez dos membros inferiores (KLEG) de cada um dos membros, assimetria de rigidez entre os membros inferiores, fase relativa contínua (FRC) dos acoplamentos coxa-tronco e coxa-perna de cada um dos lados corporais e assimetrias de FRC entre os lados corporais. Para todas as variáveis, com exceção das assimetrias, foi utilizada uma ANOVA TWO-WAY de medidas repetidas, com post-hoc de Bonferroni, para a comparação entre protocolos (A x B) e tempos (pré x pós x 24h x 48h). A significância considerada foi de p=0,05. As assimetrias foram avaliadas através da análise de tamanho do efeito (effect size), utilizando-se a classificação de Batternham e Hopinks. Ambos os protocolos provocaram fadiga muscular, mas índices de fadiga maiores foram verificados para o PB. Dor muscular tardia foi observada após a aplicação dos protocolos de fadiga, sendo que a magnitude foi a mesma para os dois protocolos. Enquanto apenas a fadiga muscular produzida pelo PB foi capaz de alterar a altura e o impulso do salto logo após sua aplicação, a potência foi afetada no tempo pós por ambos os protocolos de fadiga. A recuperação das variáveis de desempenho do salto se deu 24h após a atividade fatigante, com exceção da altura do salto que teve sua recuperação somente no tempo 48h. Em nenhum dos lados corporais KLEG foi afetada pela fadiga, em nenhuma das situações testadas. As assimetrias de KLEG sofrerem uma diminuição 24h após a aplicação do PB no movimento de CMJ. A FRC do acoplamento coxa-perna foi afetada pela fadiga de ambos os protocolos no CMJ. No STL a FRC do acoplamento coxa-tronco foi alterada pela fadiga provocada pelos dois protocolos e a FRC do acoplamento coxa-perna foi alterada somente pelo PB. Em relação as assimetrias de FRC, o PB alterou as assimetrias de FRC no CMJ, enquanto o PA modificou as assimetrias no STL. Conclui-se que a fadiga muscular não foi capaz de alterar a KLEG de membros inferiores, mas foi capaz de alterar o desempenho do salto vertical, a FRC, bem com as assimetrias de KLEG e de FRC. O protocolo com maior volume de trabalho é capaz de alterar a simetria de rigidez entre os membros inferiores de forma subaguda, enquanto ambos os protocolos são capazes de alterar a simetria de coordenação intrasegmentar entre os lados corporais de forma aguda e subaguda. Abstract: Muscular fatigue can cause biomechanical alterations in movement. Given the suggestion that this might accentuate or even cause asymmetries between the lower limbs, it was questioned whether muscular fatigue could affect parameters related to vertical jumping movement control, such as lower limbs stiffness and intrasegmental coordination. In addition, it was inquired about the effects acutes and subacutes of fatigue induced by different volumes of exercise. Thus, the aim of the present study was to verify the acute and subacute effects of fatigue induced by different workloads, on symmetry of lower limb stiffness and intrasegmental coordination during vertical jump. Participated in the study 17 physically active adult males, who underwent two fatigue protocols (PA 7x10 jumps; PB 14x10 jumps), in which fatigue index and muscle pain were quantified. The protocols were performed one week apart. Countermovement jump (CMJ) and step-off landing (STL) were performed before, after, 24 hours and 48 hours after each fatigue protocol. The variables of vertical jump performance (height, impulse and power), lower limb stiffness (KLEG) of each limb, asymmetry of stiffness between the lower limbs, continuous relative phase (CRP) of the trunk-thigh and thigh-leg of each of the body sides and CRP asymmetries between the body sides were mensured. For all variables, except for the asymmetries, a ANOVA TWO WAY repeated mensures with Bonferroni post-hoc was used to compare protocols (A x B) and times (pre x post x 24h x 48h). The significance considered was p=0.05. The asymmetries were evaluated through effect size analysis using the Batternham and Hopinks classification. Both protocols caused fatigue, but higher fatigue rates were verified for PB. Muscle pain was observed after the application of the fatigue protocols, and the magnitude was the same for both protocols. While only the fatigue produced by the PB was able to change the height and impulse of the jump shortly after its application, the power was affected in the post time by both fatigue protocols. The recovery of jump performance variables occurred 24 hours after the fatiguing activity, except for the jump height that had its recovery only in time 48h. On none of the body sides KLEG was affected by muscular fatigue, in any of the situations tested. The KLEG asymmetries suffered a decrease 24h after the application of PB in the CMJ movement. The CRP of the thigh-leg coupling was affected by the fatigue of both protocols in the CMJ. In the STL the CRP of the trunk-thigh coupling was altered by the fatigue caused by the two protocols and the CRP of the thigh-leg coupling was altered only by the PB. Regarding the asymmetries of CRP, the PB altered the asymmetries of CRP in the CMJ, while the PA modified the asymmetries in the STL. It was concluded that muscular fatigue was not able to change the lower limb KLEG but was able to change the vertical jump performance, the CRP, as well as the KLEG and CRP asymmetries. The protocol with higher workloads is capable of altering the symmetry of stiffness between the lower limbs in the subacute way, while both protocols are capable of altering, acutely and subacutely, the symmetry of intrasegmentar coordination between the bodily sides.
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- 2019
9. Anthropometric profile of military firefighters: comparison between operational and administrative work groups
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Knihs, Débora Aparecida, de Moura, Bruno Monteiro, and Reis, Luiz Francisco
- Subjects
Original Article - Abstract
Body composition is relevant for the health and work performance of firefighters. However, the behavior of these parameters has not been elucidated for groups of firefighters performing different tasks.To compare the anthropometric profile of military firefighters who perform administrative (ADM) or operational work .The sample comprised 121 (ADM = 50 and operational = 71) male military firefighters. Body mass (BM), body fat percentage (BFP), fat body mass, lean body mass, body mass index (BMI), waist circumference and somatotype were analyzed.Intergroup difference was found for body mass (ADM = 78.5 kg - operational = 84.6 kg), BMI (ADM = 25.8 - operational = 27.2) and lean body mass (ADM = 61.9 kg - operational = 66.2 kg).The groups exhibited differences in their anthropometric profile and BFP and BMI above the recommended range.A composição corporal é importante para o bombeiro militar no que diz respeito a sua saúde e ao seu desempenho no trabalho. Porém, o comportamento desse parâmetro não é elucidado nos diferentes grupos de trabalho do bombeiro militar.Comparar o perfil antropométrico de bombeiros militares entre os grupos de trabalho administrativo (ADM) e operacional.A amostra foi composta por 121 (ADM = 50 e operacional = 71) bombeiros militares do sexo masculino. Foram aferidos massa corporal (MC), percentual de gordura (%G), massa gorda, massa magra, índice de massa corporal (IMC), circunferência da cintura (CC) e somatotipia.Houve diferenças entre os grupos para as variáveis massa corporal (ADM = 78,5 kg - operacional = 84,6 kg), IMC (ADM = 25,8 - operacional = 27,2) e massa magra (ADM = 61,9 kg - operacional = 66,2 kg).Conclui-se que os grupos apresentam diferenças entre os perfis antropométricos e apresentam %G e IMC acima do recomendável.
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- 2018
10. ATIVAÇÃO ELÉTRICA DA MUSCULATURA E POTÊNCIA DE MEMBROS INFERIORES: UMA COMPARAÇÃO ENTRE ATLETAS VELOCISTAS DAS MODALIDADES NATAÇÃO E ATLETISMO DE BLUMENAU-SC
- Author
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Knihs, Débora Aparecida, primary, Reis, Luiz Francisco, additional, and Zimmermann, Anke Cristine, additional
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- 2017
- Full Text
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11. Anthropometric profile of military firefighters: comparison between operational and administrative work groups.
- Author
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Knihs DA, de Moura BM, and Reis LF
- Abstract
Background: Body composition is relevant for the health and work performance of firefighters. However, the behavior of these parameters has not been elucidated for groups of firefighters performing different tasks., Objectives: To compare the anthropometric profile of military firefighters who perform administrative (ADM) or operational work ., Methods: The sample comprised 121 (ADM = 50 and operational = 71) male military firefighters. Body mass (BM), body fat percentage (BFP), fat body mass, lean body mass, body mass index (BMI), waist circumference and somatotype were analyzed., Results: Intergroup difference was found for body mass (ADM = 78.5 kg - operational = 84.6 kg), BMI (ADM = 25.8 - operational = 27.2) and lean body mass (ADM = 61.9 kg - operational = 66.2 kg)., Conclusion: The groups exhibited differences in their anthropometric profile and BFP and BMI above the recommended range.
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- 2018
- Full Text
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