Torque, sinal eletromiográfico e respostas da frequência cardíaca durante exercícios concêntrico e excêntrico em homens idosos

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dc.contributor.authorQuitério, Robison J. [UNESP]
dc.contributor.authorMelo, Ruth C.
dc.contributor.authorTakahashi, Anielle C. M.
dc.contributor.authorAniceto, Isabela A. V.
dc.contributor.authorSilva, Ester
dc.contributor.authorCatai, Aparecida M.
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Metodista de Piracicaba (UNIMEP)
dc.date.accessioned2022-04-28T22:36:59Z
dc.date.available2022-04-28T22:36:59Z
dc.date.issued2011-01-01
dc.description.abstractBackground: 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°/s and 120°/s. SEMG activity was recorded from vastus lateralis muscle and normalized by Root Mean Square-RMS (μV) of maximal isometric knee extension at 60°. 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 (μV) was larger during concentric contraction (C60°/s=2.80 and 0.99; C120°/s=2.46 and 1.0) than eccentric (E60°/s=3.94 and 0.85; E120°/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. © Revista Brasileira de Fisioterapia.en
dc.description.affiliationPhysical Therapy Department Universidade Federal de São Carlos (UFSCar), São Carlos, SP
dc.description.affiliationSpecial Education Department Universidade Estadual Paulista 'Julio de Mesquita Filho' (UNESP), Marilia, SP
dc.description.affiliationFaculty of Health Sciences Universidade Metodista de Piracicaba (UNIMEP), Piracicaba, SP
dc.description.affiliationUnespSpecial Education Department Universidade Estadual Paulista 'Julio de Mesquita Filho' (UNESP), Marilia, SP
dc.format.extent8-14
dc.identifierhttp://dx.doi.org/10.1590/S1413-35552011005000004
dc.identifier.citationRevista Brasileira de Fisioterapia, v. 15, n. 1, p. 8-14, 2011.
dc.identifier.doi10.1590/S1413-35552011005000004
dc.identifier.issn1413-3555
dc.identifier.issn1809-9246
dc.identifier.scopus2-s2.0-79953238504
dc.identifier.urihttp://hdl.handle.net/11449/226288
dc.language.isopor
dc.relation.ispartofRevista Brasileira de Fisioterapia
dc.sourceScopus
dc.subjectElderly
dc.subjectExercise
dc.subjectHeart rate
dc.subjectIsokinetic
dc.subjectSurface electromyography
dc.titleTorque, sinal eletromiográfico e respostas da frequência cardíaca durante exercícios concêntrico e excêntrico em homens idosospt
dc.title.alternativeTorque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older menen
dc.typeArtigo

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