Pennation angle of vastus laterallis during isometric contractions performed at two knee angles
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Fisioterapia em Movimento |
Texto Completo: | https://periodicos.pucpr.br/fisio/article/view/23079 |
Resumo: | Introduction: The pennation angle (PA) of a muscle is not static value, but it adapts to the conditions imposed by the contraction intensity required. Objective: This study investigates the effect of knee angle (KA) and intensity of contraction (IC) on PA of vastus lateralis (VL). Methods: Eight women and nine men executed isometric torques lasting 5s at the maximal voluntary contraction (MVC), 25%, 50% and 75% of MVC, on an isokinetic dynamometer with the KA at 90° and 120° (full extension = 180°). The PA was measured in each test, and with the subject relaxed. The effect of IC on PA was tested by means of repeated measures ANOVA and effect size (ES), and of the KA on PA by paired t test, employed on each IC, together with the statistics: intraclass correlation (ICC), standard error of measurement (SEM) and ES, all calculated with the PAs measured at both KAs. Results: The PA increased significantly and successively with the IC (p < 0.05; ES between 1.11 and 3.04), but was not influenced by KA (p > 0.05; ICC between 0.70 and 0.81; SEM between 0.7° and 1.4°; ES between 0.02 and 0.2). Conclusion: The successive increase of PA with the IC supports the existence of relation between these variables. While studies advocate the effect of PA on joint angle this was not observed in this study, probable because the 30o of between KA difference employed was not enough to provide change in PA. |
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Fisioterapia em Movimento |
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Pennation angle of vastus laterallis during isometric contractions performed at two knee anglesIntroduction: The pennation angle (PA) of a muscle is not static value, but it adapts to the conditions imposed by the contraction intensity required. Objective: This study investigates the effect of knee angle (KA) and intensity of contraction (IC) on PA of vastus lateralis (VL). Methods: Eight women and nine men executed isometric torques lasting 5s at the maximal voluntary contraction (MVC), 25%, 50% and 75% of MVC, on an isokinetic dynamometer with the KA at 90° and 120° (full extension = 180°). The PA was measured in each test, and with the subject relaxed. The effect of IC on PA was tested by means of repeated measures ANOVA and effect size (ES), and of the KA on PA by paired t test, employed on each IC, together with the statistics: intraclass correlation (ICC), standard error of measurement (SEM) and ES, all calculated with the PAs measured at both KAs. Results: The PA increased significantly and successively with the IC (p < 0.05; ES between 1.11 and 3.04), but was not influenced by KA (p > 0.05; ICC between 0.70 and 0.81; SEM between 0.7° and 1.4°; ES between 0.02 and 0.2). Conclusion: The successive increase of PA with the IC supports the existence of relation between these variables. While studies advocate the effect of PA on joint angle this was not observed in this study, probable because the 30o of between KA difference employed was not enough to provide change in PA.Editora PUCPRESS2017-11-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.pucpr.br/fisio/article/view/2307910.1590/1980-5918.030.S01.AO07Fisioterapia em Movimento (Physical Therapy in Movement); Vol. 30 (2017): Suppl 1Fisioterapia em Movimento; v. 30 (2017): Suppl 11980-5918reponame:Fisioterapia em Movimentoinstname:Pontifícia Universidade Católica do Paraná (PUC-PR)instacron:PUC_PRenghttps://periodicos.pucpr.br/fisio/article/view/23079/pdfCopyright (c) 2022 PUCPRESSinfo:eu-repo/semantics/openAccessde Oliveira, Felipe Torres MirandaGomes de Oliveira, CarlosFarinatti, Paulo2022-03-07T19:02:06Zoai:ojs.periodicos.pucpr.br:article/23079Revistahttps://periodicos.pucpr.br/fisioPRIhttps://periodicos.pucpr.br/fisio/oairubia.farias@pucpr.br||revista.fisioterapia@pucpr.br1980-59180103-5150opendoar:2022-03-07T19:02:06Fisioterapia em Movimento - Pontifícia Universidade Católica do Paraná (PUC-PR)false |
dc.title.none.fl_str_mv |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
title |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
spellingShingle |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles de Oliveira, Felipe Torres Miranda |
title_short |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
title_full |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
title_fullStr |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
title_full_unstemmed |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
title_sort |
Pennation angle of vastus laterallis during isometric contractions performed at two knee angles |
author |
de Oliveira, Felipe Torres Miranda |
author_facet |
de Oliveira, Felipe Torres Miranda Gomes de Oliveira, Carlos Farinatti, Paulo |
author_role |
author |
author2 |
Gomes de Oliveira, Carlos Farinatti, Paulo |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
de Oliveira, Felipe Torres Miranda Gomes de Oliveira, Carlos Farinatti, Paulo |
description |
Introduction: The pennation angle (PA) of a muscle is not static value, but it adapts to the conditions imposed by the contraction intensity required. Objective: This study investigates the effect of knee angle (KA) and intensity of contraction (IC) on PA of vastus lateralis (VL). Methods: Eight women and nine men executed isometric torques lasting 5s at the maximal voluntary contraction (MVC), 25%, 50% and 75% of MVC, on an isokinetic dynamometer with the KA at 90° and 120° (full extension = 180°). The PA was measured in each test, and with the subject relaxed. The effect of IC on PA was tested by means of repeated measures ANOVA and effect size (ES), and of the KA on PA by paired t test, employed on each IC, together with the statistics: intraclass correlation (ICC), standard error of measurement (SEM) and ES, all calculated with the PAs measured at both KAs. Results: The PA increased significantly and successively with the IC (p < 0.05; ES between 1.11 and 3.04), but was not influenced by KA (p > 0.05; ICC between 0.70 and 0.81; SEM between 0.7° and 1.4°; ES between 0.02 and 0.2). Conclusion: The successive increase of PA with the IC supports the existence of relation between these variables. While studies advocate the effect of PA on joint angle this was not observed in this study, probable because the 30o of between KA difference employed was not enough to provide change in PA. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-11-30 |
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://periodicos.pucpr.br/fisio/article/view/23079 10.1590/1980-5918.030.S01.AO07 |
url |
https://periodicos.pucpr.br/fisio/article/view/23079 |
identifier_str_mv |
10.1590/1980-5918.030.S01.AO07 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.pucpr.br/fisio/article/view/23079/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2022 PUCPRESS info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2022 PUCPRESS |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Editora PUCPRESS |
publisher.none.fl_str_mv |
Editora PUCPRESS |
dc.source.none.fl_str_mv |
Fisioterapia em Movimento (Physical Therapy in Movement); Vol. 30 (2017): Suppl 1 Fisioterapia em Movimento; v. 30 (2017): Suppl 1 1980-5918 reponame:Fisioterapia em Movimento instname:Pontifícia Universidade Católica do Paraná (PUC-PR) instacron:PUC_PR |
instname_str |
Pontifícia Universidade Católica do Paraná (PUC-PR) |
instacron_str |
PUC_PR |
institution |
PUC_PR |
reponame_str |
Fisioterapia em Movimento |
collection |
Fisioterapia em Movimento |
repository.name.fl_str_mv |
Fisioterapia em Movimento - Pontifícia Universidade Católica do Paraná (PUC-PR) |
repository.mail.fl_str_mv |
rubia.farias@pucpr.br||revista.fisioterapia@pucpr.br |
_version_ |
1799138748453093376 |