Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle

Detalhes bibliográficos
Autor(a) principal: Corrêa, Fernanda Ishida
Data de Publicação: 2006
Outros Autores: Corrêa, João Carlos Ferrari, Martinelli, José Luiz, Oliveira, Adriano Rodrigues de, Oliveira, Cláudia Santos
Tipo de documento: Artigo
Idioma: por
Título da fonte: Fisioterapia e Pesquisa
Texto Completo: https://www.revistas.usp.br/fpusp/article/view/76222
Resumo: The purpose of this study was to determine test-retest reliability of electromyography (EMG) during sustained fatiguing contractions of the quadriceps. Ten healthy subjects (five male, five female) were tested on two days, one week apart. Surface EMG was recorded from rectus femoris, vastus lateralis and vastus medialis during sustained isometric contractions at 80% of maximal voluntary contraction held to exhaustion. Quadriceps fatigue was described using three measures for recorded median frequencies (MDF): initial, final, and normalized. Collected initial, final and normalized values showed little variation, indicating similarity between the measures; high reliability (ICC, Intraclass Correlation Coefficient = 0.60-0.85) was found for all three muscle groups at contraction level. The gradual decline in median frequency values clearlyexposes the process of muscle fatigue, related to muscles' physiological changes. The high ICC values found point to reproducibility of measuring muscular fatigue during femoral quadriceps sustained contraction, showing that the proposed methodology is reliable and trustworthy, hence may be used to assess muscular fatigue.
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spelling Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscleReprodutibilidade da eletromiografia na fadiga muscular durante contração isométrica do músculo quadríceps femoraleletromiografiafadiga muscularmúsculo quadrícepsreprodutibilidade de testes.electromyographyMuscle fatiguequadriceps musclereproducibility of results.The purpose of this study was to determine test-retest reliability of electromyography (EMG) during sustained fatiguing contractions of the quadriceps. Ten healthy subjects (five male, five female) were tested on two days, one week apart. Surface EMG was recorded from rectus femoris, vastus lateralis and vastus medialis during sustained isometric contractions at 80% of maximal voluntary contraction held to exhaustion. Quadriceps fatigue was described using three measures for recorded median frequencies (MDF): initial, final, and normalized. Collected initial, final and normalized values showed little variation, indicating similarity between the measures; high reliability (ICC, Intraclass Correlation Coefficient = 0.60-0.85) was found for all three muscle groups at contraction level. The gradual decline in median frequency values clearlyexposes the process of muscle fatigue, related to muscles' physiological changes. The high ICC values found point to reproducibility of measuring muscular fatigue during femoral quadriceps sustained contraction, showing that the proposed methodology is reliable and trustworthy, hence may be used to assess muscular fatigue.Visou-se investigar a reprodutibilidade de medições eletromiográficas durante contração isométrica fadigante nos músculos reto femoral, vasto medial e vasto lateral. Dez voluntários saudáveis (cinco homens e cinco mulheres) foram selecionados e avaliados em dois dias (teste e reteste)com uma semana de intervalo. Os sinais eletromiográficos do reto femoral, vasto medial e vasto lateral foram registrados durante contração sustentada isométrica a 80% da contração isométrica voluntária máxima mantida até a exaustão (considerada quando do decréscimo em 20% dos valores iniciais). A fadiga no mecanismo extensor do quadríceps foi descrita utilizandose três medidas para a freqüência mediana: inicial, final e valor normalizado. Os dados eletromiográficos iniciais, finais e normalizados mostram pouca variação, indicando similaridade entre as medidas; foi constatada alta confiabilidade para os três músculos avaliados. Torna-se evidente, pelo declínio dos valores da freqüência mediana, o processo de fadiga muscular, relacionado a mudanças fisiológicas do músculo. Os altos valores do índice de correlação intra-classe encontrados no teste e re-teste indicam a reprodutibilidade da medição da fadiga muscular pela contração sustentada do músculo quadríceps femoral, demonstrando que a metodologia proposta é fidedigna e confiável, permitindo que seja utilizada como base para obtenção de indicadores de fadiga muscular.Universidade de São Paulo. Faculdade de Medicina2006-08-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/fpusp/article/view/7622210.1590/fpusp.v13i2.76222Fisioterapia e Pesquisa; Vol. 13 No. 2 (2006); 46-52Fisioterapia e Pesquisa; Vol. 13 Núm. 2 (2006); 46-52Fisioterapia e Pesquisa; v. 13 n. 2 (2006); 46-522316-91171809-2950reponame:Fisioterapia e Pesquisainstname:Universidade de São Paulo (USP)instacron:USPporhttps://www.revistas.usp.br/fpusp/article/view/76222/79960Copyright (c) 2017 Fisioterapia e Pesquisainfo:eu-repo/semantics/openAccessCorrêa, Fernanda IshidaCorrêa, João Carlos FerrariMartinelli, José LuizOliveira, Adriano Rodrigues deOliveira, Cláudia Santos2014-05-07T22:37:39Zoai:revistas.usp.br:article/76222Revistahttp://www.revistas.usp.br/fpuspPUBhttps://www.revistas.usp.br/fpusp/oai||revfisio@usp.br2316-91171809-2950opendoar:2014-05-07T22:37:39Fisioterapia e Pesquisa - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
Reprodutibilidade da eletromiografia na fadiga muscular durante contração isométrica do músculo quadríceps femoral
title Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
spellingShingle Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
Corrêa, Fernanda Ishida
eletromiografia
fadiga muscular
músculo quadríceps
reprodutibilidade de testes.
electromyography
Muscle fatigue
quadriceps muscle
reproducibility of results.
title_short Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
title_full Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
title_fullStr Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
title_full_unstemmed Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
title_sort Reproducibility of electromyography of muscular fatigue during isometric contraction of the quadriceps muscle
author Corrêa, Fernanda Ishida
author_facet Corrêa, Fernanda Ishida
Corrêa, João Carlos Ferrari
Martinelli, José Luiz
Oliveira, Adriano Rodrigues de
Oliveira, Cláudia Santos
author_role author
author2 Corrêa, João Carlos Ferrari
Martinelli, José Luiz
Oliveira, Adriano Rodrigues de
Oliveira, Cláudia Santos
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Corrêa, Fernanda Ishida
Corrêa, João Carlos Ferrari
Martinelli, José Luiz
Oliveira, Adriano Rodrigues de
Oliveira, Cláudia Santos
dc.subject.por.fl_str_mv eletromiografia
fadiga muscular
músculo quadríceps
reprodutibilidade de testes.
electromyography
Muscle fatigue
quadriceps muscle
reproducibility of results.
topic eletromiografia
fadiga muscular
músculo quadríceps
reprodutibilidade de testes.
electromyography
Muscle fatigue
quadriceps muscle
reproducibility of results.
description The purpose of this study was to determine test-retest reliability of electromyography (EMG) during sustained fatiguing contractions of the quadriceps. Ten healthy subjects (five male, five female) were tested on two days, one week apart. Surface EMG was recorded from rectus femoris, vastus lateralis and vastus medialis during sustained isometric contractions at 80% of maximal voluntary contraction held to exhaustion. Quadriceps fatigue was described using three measures for recorded median frequencies (MDF): initial, final, and normalized. Collected initial, final and normalized values showed little variation, indicating similarity between the measures; high reliability (ICC, Intraclass Correlation Coefficient = 0.60-0.85) was found for all three muscle groups at contraction level. The gradual decline in median frequency values clearlyexposes the process of muscle fatigue, related to muscles' physiological changes. The high ICC values found point to reproducibility of measuring muscular fatigue during femoral quadriceps sustained contraction, showing that the proposed methodology is reliable and trustworthy, hence may be used to assess muscular fatigue.
publishDate 2006
dc.date.none.fl_str_mv 2006-08-31
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/fpusp/article/view/76222
10.1590/fpusp.v13i2.76222
url https://www.revistas.usp.br/fpusp/article/view/76222
identifier_str_mv 10.1590/fpusp.v13i2.76222
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://www.revistas.usp.br/fpusp/article/view/76222/79960
dc.rights.driver.fl_str_mv Copyright (c) 2017 Fisioterapia e Pesquisa
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Fisioterapia e Pesquisa
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Medicina
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Medicina
dc.source.none.fl_str_mv Fisioterapia e Pesquisa; Vol. 13 No. 2 (2006); 46-52
Fisioterapia e Pesquisa; Vol. 13 Núm. 2 (2006); 46-52
Fisioterapia e Pesquisa; v. 13 n. 2 (2006); 46-52
2316-9117
1809-2950
reponame:Fisioterapia e Pesquisa
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Fisioterapia e Pesquisa
collection Fisioterapia e Pesquisa
repository.name.fl_str_mv Fisioterapia e Pesquisa - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ||revfisio@usp.br
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