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Rapid hamstrings/quadriceps strength capacity in professional soccer players with different conventional isokinetic muscle strength ratios

dc.contributor.authorGreco, Camila C. [UNESP]
dc.contributor.authorda Silva, Wendell L. [UNESP]
dc.contributor.authorCamarda, Sérgio R.A. [UNESP]
dc.contributor.authorDenadai, Benedito S. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T05:36:43Z
dc.date.available2022-04-29T05:36:43Z
dc.date.issued2012-09-01
dc.description.abstractMuscle strength imbalance can be an important factor in hamstrings muscle strain. A hamstrings/quadriceps (H/Q) strength ratio based on concentric peak torque values (H con:Q con) has traditionally been used to describe the potential for knee-joint destabilization. Because certain standard actions in soccer are explosive, the analysis of the H/Q strength ratio based on the rate of torque development (H rtd:Q rtd) might also be useful in the evaluation of joint stability. The objective of this study was to compare the H rtd:Q rtd between professional soccer players with heterogeneous values of H con:Q con. Thirty-nine professional soccer players took part in the following procedures on different days: 1) Familiarization session with the isokinetic dynamometer, and 2) Two maximal isometric actions and five maximal concentric actions at 60°·s-1 for hamstrings (H) and quadriceps (Q). Participants were ranked according to their H con:Q con ratio. The median third was excluded to form a high torque group (HTG), and a low torque group (LTG). Peak isometric (H) and concentric (H and Q) torques and rate of torque development (H) were significantly greater in the HTG group. Similarly, H con:Q con (0.68 ± 0.02 vs. 0.52 ± 0.03) and H rtd:Q rtd (0.54 ± 0.12 vs. 0.43 ± 0.16) were significantly greater in the HTG group than in the LTG group. There was no significant correlation between H con:Q con and H rtd:Q rtd. It can be concluded that H con:Q con and H rtd:Q rtd are determined, but not fully defined, by shared putative physiological mechanisms. Thus, the physiologic and clinical significance of H con:Q con and H rtd:Q rtd to an athlete's individual evaluation might be different. © Journal of Sports Science and Medicine (2012).en
dc.description.affiliationHuman Performance Laboratory UNESP, Av. 24A, 1515, Bela Vista, CEP 13506-900, Rio Claro, SP
dc.description.affiliationUnespHuman Performance Laboratory UNESP, Av. 24A, 1515, Bela Vista, CEP 13506-900, Rio Claro, SP
dc.format.extent418-422
dc.identifier.citationJournal of Sports Science and Medicine, v. 11, n. 3, p. 418-422, 2012.
dc.identifier.issn1303-2968
dc.identifier.scopus2-s2.0-84867618100
dc.identifier.urihttp://hdl.handle.net/11449/227005
dc.language.isoeng
dc.relation.ispartofJournal of Sports Science and Medicine
dc.sourceScopus
dc.subjectInjury
dc.subjectIsometric action
dc.subjectMuscular torque
dc.titleRapid hamstrings/quadriceps strength capacity in professional soccer players with different conventional isokinetic muscle strength ratiosen
dc.typeArtigo
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Rio Claropt
unesp.departmentEducação Física - IBpt

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