Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1413-35552011005000004 http://hdl.handle.net/11449/10623 |
Resumo: | Background: The literature reports that the eccentric muscular action produces greater force and lower myoelectric activity than the concentric muscular action, while the heart rate (HR) responses are bigger during concentric contraction. Objectives: To investigate the maximum average torque (MAT), surface electromyographic (SEMG) and the heart rate (HR) responses during different types of muscular contraction and angular velocities in older men. Methods: Twelve healthy men (61.7 +/- 1.6years) performed concentric (C) and eccentric (E) isokinetic knee extension-flexion at 60 degrees/s and 120 degrees/s. SEMG activity was recorded from vastus lateralis muscle and normalized by Root Mean Square-RMS (mu V) of maximal isometric knee extension at 60 degrees. HR (beats/min) and was recorded at rest and throughout each contraction. The data were analyzed by the Friedman test for repeated measures with post hoc Dunn's test (p<0.05). Results: The median values of MAT (N.m/kg) was smaller and the RMS (mu V) was larger during concentric contraction (C60 degrees/s=2.80 and 0.99; C120 degrees/s=2.46 and 1.0) than eccentric (E60 degrees/s=3.94 and 0.85; E120 degrees/s=4.08 and 0.89), respectively. The HR variation was similar in the four conditions studied. Conclusion: The magnitude of MAT and RMS responses in older men were dependent of the nature of the muscular action and independent of the angular velocity, whereas HR response was not influenced by these factors. |
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Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older menTorque, sinal eletromiográfico e respostas da frequência cardíaca durante exercícios concêntrico e excêntrico em homens idososelderlyheart rateisokineticexercisesurface electromyographyBackground: The literature reports that the eccentric muscular action produces greater force and lower myoelectric activity than the concentric muscular action, while the heart rate (HR) responses are bigger during concentric contraction. Objectives: To investigate the maximum average torque (MAT), surface electromyographic (SEMG) and the heart rate (HR) responses during different types of muscular contraction and angular velocities in older men. Methods: Twelve healthy men (61.7 +/- 1.6years) performed concentric (C) and eccentric (E) isokinetic knee extension-flexion at 60 degrees/s and 120 degrees/s. SEMG activity was recorded from vastus lateralis muscle and normalized by Root Mean Square-RMS (mu V) of maximal isometric knee extension at 60 degrees. HR (beats/min) and was recorded at rest and throughout each contraction. The data were analyzed by the Friedman test for repeated measures with post hoc Dunn's test (p<0.05). Results: The median values of MAT (N.m/kg) was smaller and the RMS (mu V) was larger during concentric contraction (C60 degrees/s=2.80 and 0.99; C120 degrees/s=2.46 and 1.0) than eccentric (E60 degrees/s=3.94 and 0.85; E120 degrees/s=4.08 and 0.89), respectively. The HR variation was similar in the four conditions studied. Conclusion: The magnitude of MAT and RMS responses in older men were dependent of the nature of the muscular action and independent of the angular velocity, whereas HR response was not influenced by these factors.CONTEXTUALIZAÇÃO: A literatura refere que a ação muscular excêntrica produz maior força e menor atividade mioelétrica que a concêntrica, enquanto a resposta da frequência cardíaca (FC) é maior durante a contração concêntrica que durante a excêntrica. OBJETIVOS: Investigar as respostas de torque médio máximo (TMM), eletromiografia de superfície (EMGs) e FC durante diferentes tipos de contração muscular e velocidades angulares em homens idosos. MATERIAIS E MÉTODOS: Doze homens saudáveis (61,7±1,6 anos) realizaram flexões e extensões do joelho concêntrica (C) e excêntrica (E) em 60º/s e 120º/s. Registrou-se a atividade EMGs do músculo vasto lateral e normalizou-se pela RMS (µV) da extensão isométrica máxima do joelho em 60º. A FC (bpm) foi registrada em repouso e durante cada contração. Os dados foram analisados utilizando-se o teste de Friedman para medidas repetidas com post hoc de Dunn (p<0,05). RESULTADOS: Os valores médios de TMM (N.m/kg) foram menores e os de RMS (µV) foram maiores (p<0,05) nas contrações concêntricas (C60º/s=2,80 e 0,99; C120º/s=2,46 e 1,0) comparativamente com as excêntricas (E60º/s=3,94 e 0,85; E120º/s=4,08 e 0,89), respectivamente. Já a variação da FC foi semelhante nas quatro condições estudadas. CONCLUSÃO: A magnitude das respostas de TMM e RMS em homens idosos foi dependente da natureza da ação muscular e independente da velocidade angular, enquanto as respostas da FC não foram influenciadas por esses fatores.Universidade Federal de São Carlos (UFSCar), Dept Fisioterapia, Nucleo Pesquisa Exercicio Fis, BR-13565905 São Carlos, SP, BrazilUniv Estadual Paulista Julio de Mesquita Filho UN, Dept Special Educ, Marilia, SP, BrazilUniv Metodista Piracicaba, Fac Hlth Sci, Piracicaba, SP, BrazilUniv Estadual Paulista Julio de Mesquita Filho UN, Dept Special Educ, Marilia, SP, BrazilAssociação Brasileira Pesquisa Pos-graduacao Fisioterapia-abrapg-ftUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Univ Metodista PiracicabaQuitério, Robison José [UNESP]Melo, Ruth C.Takahashi, Anielle C. M.Aniceto, Isabela A. V.Silva, EsterCatai, Aparecida M.2014-05-20T13:31:11Z2014-05-20T13:31:11Z2011-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1590/S1413-35552011005000004Revista Brasileira de Fisioterapia. São Carlos Sp: Associação Brasileira Pesquisa Pos-graduacao Fisioterapia-abrapg-ft, v. 15, n. 1, p. 8-14, 2011.1413-3555http://hdl.handle.net/11449/10623S1413-35552011000100004WOS:000289857600003S1413-35552011000100004-en.pdf55428261316822380000-0002-6431-6560Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Fisioterapia1.6990,802info:eu-repo/semantics/openAccess2023-10-13T06:09:16Zoai:repositorio.unesp.br:11449/10623Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-13T06:09:16Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men Torque, sinal eletromiográfico e respostas da frequência cardíaca durante exercícios concêntrico e excêntrico em homens idosos |
title |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men |
spellingShingle |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men Quitério, Robison José [UNESP] elderly heart rate isokinetic exercise surface electromyography |
title_short |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men |
title_full |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men |
title_fullStr |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men |
title_full_unstemmed |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men |
title_sort |
Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men |
author |
Quitério, Robison José [UNESP] |
author_facet |
Quitério, Robison José [UNESP] Melo, Ruth C. Takahashi, Anielle C. M. Aniceto, Isabela A. V. Silva, Ester Catai, Aparecida M. |
author_role |
author |
author2 |
Melo, Ruth C. Takahashi, Anielle C. M. Aniceto, Isabela A. V. Silva, Ester Catai, Aparecida M. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) Univ Metodista Piracicaba |
dc.contributor.author.fl_str_mv |
Quitério, Robison José [UNESP] Melo, Ruth C. Takahashi, Anielle C. M. Aniceto, Isabela A. V. Silva, Ester Catai, Aparecida M. |
dc.subject.por.fl_str_mv |
elderly heart rate isokinetic exercise surface electromyography |
topic |
elderly heart rate isokinetic exercise surface electromyography |
description |
Background: The literature reports that the eccentric muscular action produces greater force and lower myoelectric activity than the concentric muscular action, while the heart rate (HR) responses are bigger during concentric contraction. Objectives: To investigate the maximum average torque (MAT), surface electromyographic (SEMG) and the heart rate (HR) responses during different types of muscular contraction and angular velocities in older men. Methods: Twelve healthy men (61.7 +/- 1.6years) performed concentric (C) and eccentric (E) isokinetic knee extension-flexion at 60 degrees/s and 120 degrees/s. SEMG activity was recorded from vastus lateralis muscle and normalized by Root Mean Square-RMS (mu V) of maximal isometric knee extension at 60 degrees. HR (beats/min) and was recorded at rest and throughout each contraction. The data were analyzed by the Friedman test for repeated measures with post hoc Dunn's test (p<0.05). Results: The median values of MAT (N.m/kg) was smaller and the RMS (mu V) was larger during concentric contraction (C60 degrees/s=2.80 and 0.99; C120 degrees/s=2.46 and 1.0) than eccentric (E60 degrees/s=3.94 and 0.85; E120 degrees/s=4.08 and 0.89), respectively. The HR variation was similar in the four conditions studied. Conclusion: The magnitude of MAT and RMS responses in older men were dependent of the nature of the muscular action and independent of the angular velocity, whereas HR response was not influenced by these factors. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-01 2014-05-20T13:31:11Z 2014-05-20T13:31:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1413-35552011005000004 Revista Brasileira de Fisioterapia. São Carlos Sp: Associação Brasileira Pesquisa Pos-graduacao Fisioterapia-abrapg-ft, v. 15, n. 1, p. 8-14, 2011. 1413-3555 http://hdl.handle.net/11449/10623 S1413-35552011000100004 WOS:000289857600003 S1413-35552011000100004-en.pdf 5542826131682238 0000-0002-6431-6560 |
url |
http://dx.doi.org/10.1590/S1413-35552011005000004 http://hdl.handle.net/11449/10623 |
identifier_str_mv |
Revista Brasileira de Fisioterapia. São Carlos Sp: Associação Brasileira Pesquisa Pos-graduacao Fisioterapia-abrapg-ft, v. 15, n. 1, p. 8-14, 2011. 1413-3555 S1413-35552011000100004 WOS:000289857600003 S1413-35552011000100004-en.pdf 5542826131682238 0000-0002-6431-6560 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira de Fisioterapia 1.699 0,802 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Associação Brasileira Pesquisa Pos-graduacao Fisioterapia-abrapg-ft |
publisher.none.fl_str_mv |
Associação Brasileira Pesquisa Pos-graduacao Fisioterapia-abrapg-ft |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964548491378688 |