Eccentric torque-producing capacity is influenced by muscle length in older healthy adults

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dc.contributor.authorMelo, Ruth C.
dc.contributor.authorTakahashi, Anielle C. M.
dc.contributor.authorQuitério, Robison J. [UNESP]
dc.contributor.authorSalvini, Tânia F.
dc.contributor.authorCatai, Aparecida M.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2015-12-07T15:36:33Z
dc.date.available2015-12-07T15:36:33Z
dc.date.issued2015-05-30
dc.description.abstractConsidering the importance of muscle strength to functional capacity in the elderly, the study investigated the effects of age on isokinetic performance and torque production as a function of muscle length. Eleven younger (24.2±2.9years) and seventeen older men (62.7±2.5years) were subjected to concentric and eccentric isokinetic knee extension/flexion at 60°.s-1 and 120°.s-1 through a functional range of motion. The older group presented lower peak torque (Nm) than the young group for both isokinetic contraction types (age effect, p<0.001). Peak torque deficits in the older group were near 30% and 29% for concentric and eccentric contraction, respectively. Concentric peak torque was lower at 120.s-1 than at 60.s-1 for both groups (angular velocity effect, p<0.001). Eccentric knee extension torque was the only exercise tested that showed an interaction effect between age and muscle length (p<0.001), which suggested different torque responses to the muscle length between groups. Compared with the young group, the eccentric knee extension torque was 22% to 56% lower in the older group, with the deficits being lower in the shortened muscle length (22-27%) and higher (33-56%) in stretched muscle length. In older men, the production of eccentric knee strength seems to be muscle length-dependent. At more stretched positions, older subjects lose the capacity to generate eccentric knee extension torque. More studies are needed to assess the mechanisms involved in eccentric strength preservation with aging and its relationship with muscle length.en
dc.description.affiliationSchool of Arts, Sciences and Humanities, University of São Paulo, São Paulo, SP, Brazil.
dc.description.affiliationDepartment of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil.
dc.description.affiliationUniversidade Estadual Paulista-UNESP, Marília, SP, Brazil.
dc.description.affiliationUnespUniversidade Estadual Paulista-UNESP, Marília, SP, Brazil.
dc.identifierhttp://dx.doi.org/10.1519/JSC.0000000000001047
dc.identifier.citationJournal Of Strength And Conditioning Research / National Strength & Conditioning Association, 2015.
dc.identifier.doi10.1519/JSC.0000000000001047
dc.identifier.issn1533-4287
dc.identifier.lattes5542826131682238
dc.identifier.orcid0000-0002-6431-6560
dc.identifier.pubmed26049788
dc.identifier.urihttp://hdl.handle.net/11449/131504
dc.language.isoeng
dc.publisherNational Strength & Conditioning Association
dc.relation.ispartofJournal Of Strength And Conditioning Research / National Strength & Conditioning Association
dc.relation.ispartofsjr1,366
dc.rights.accessRightsAcesso restrito
dc.sourcePubMed
dc.titleEccentric torque-producing capacity is influenced by muscle length in older healthy adultsen
dc.typeArtigo
dcterms.rightsHolderNational Strength & Conditioning Association
unesp.author.lattes5542826131682238[3]
unesp.author.orcid0000-0002-6431-6560[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Filosofia e Ciências, Maríliapt

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