Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?

Detalhes bibliográficos
Autor(a) principal: Moreira, Pedro Vieira Sarmet [UNESP]
Data de Publicação: 2021
Outros Autores: Falco, Coral, Menegaldo, Luciano Luporini, Goethel, Márcio Fagundes [UNESP], De Paula, Leandro Vinhas, Goncąlves, Mauro [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1371/journal.pone.0235582
http://hdl.handle.net/11449/208770
Resumo: The aim of this study is to analyze how isokinetic knee and hip peak torques and roundhouse kick velocities are related to expertise level (elite vs. sub-elite) in taekwondo athletes. Seven elite and seven sub-elite athletes were tested for kick-specific variables (KSV, composed of kinematic variables and power of impact) and for concentric isokinetic peak torque (PT) at 60°/s and 240°/s. First, KSVs and PTs were compared between groups, then PTs were correlated with KSVs. Parametric variables with larger effect sizes (Cohen's d) were entered in a stepwise linear discriminant analysis (LDA), generating an equation to estimate competitive level. Between-group differences were found in hip flexors (p = 0.04, d = 0.92) and extensors (p = 0.04, d = 0.96) with PT at 240°/s. Hip flexion PT at 60°/s and 240°/s correlated negatively with kick time (R =-0.46, p = 0.0499 and R =-0.62, p = 0.01 respectively). Hip flexion torque at 60°/s correlated positively (R = 0.52, p = 0.03) with peak linear velocity of the foot (LVF) and power of impact (R = 0.51, p = 0.03). Peak torque of hip extension at 60°/s and hip abduction at 240°/s also correlated with LVF (R = 0.56, p = 0.02 and R = 0.46, p = 0.0499). Hip extension at 60°/s correlated positively with peak linear velocity of the knee (R = 0.48, p = 0.04). The LDA showed an accuracy of 85.7% (p = 0.003) in predicting expertise level based on hip flexion and extension torques at 240°/s and on knee extension velocity during the kick. The study demonstrates that hip muscle strength is probably the dominant muscular factor for determining kick performance. Knee angular velocity combined with hip torques is the best discriminator for competitive level in taekwondo athletes.
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spelling Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?The aim of this study is to analyze how isokinetic knee and hip peak torques and roundhouse kick velocities are related to expertise level (elite vs. sub-elite) in taekwondo athletes. Seven elite and seven sub-elite athletes were tested for kick-specific variables (KSV, composed of kinematic variables and power of impact) and for concentric isokinetic peak torque (PT) at 60°/s and 240°/s. First, KSVs and PTs were compared between groups, then PTs were correlated with KSVs. Parametric variables with larger effect sizes (Cohen's d) were entered in a stepwise linear discriminant analysis (LDA), generating an equation to estimate competitive level. Between-group differences were found in hip flexors (p = 0.04, d = 0.92) and extensors (p = 0.04, d = 0.96) with PT at 240°/s. Hip flexion PT at 60°/s and 240°/s correlated negatively with kick time (R =-0.46, p = 0.0499 and R =-0.62, p = 0.01 respectively). Hip flexion torque at 60°/s correlated positively (R = 0.52, p = 0.03) with peak linear velocity of the foot (LVF) and power of impact (R = 0.51, p = 0.03). Peak torque of hip extension at 60°/s and hip abduction at 240°/s also correlated with LVF (R = 0.56, p = 0.02 and R = 0.46, p = 0.0499). Hip extension at 60°/s correlated positively with peak linear velocity of the knee (R = 0.48, p = 0.04). The LDA showed an accuracy of 85.7% (p = 0.003) in predicting expertise level based on hip flexion and extension torques at 240°/s and on knee extension velocity during the kick. The study demonstrates that hip muscle strength is probably the dominant muscular factor for determining kick performance. Knee angular velocity combined with hip torques is the best discriminator for competitive level in taekwondo athletes.Biomedical Engineering Program Federal University of Rio de Janeiro CoppeLaboratory of Biomechanics Saõ Paulo State University (UNESP)Tech4Fight Sports TechnologyDepartment of Sport Western Norway University of Applied Sciences Food and Natural SciencesLaboratory of Biomechanics Federal University of Minas GeraisLaboratory of Biomechanics Saõ Paulo State University (UNESP)CoppeUniversidade Estadual Paulista (Unesp)Tech4Fight Sports TechnologyFood and Natural SciencesUniversidade Federal de Minas Gerais (UFMG)Moreira, Pedro Vieira Sarmet [UNESP]Falco, CoralMenegaldo, Luciano LuporiniGoethel, Márcio Fagundes [UNESP]De Paula, Leandro VinhasGoncąlves, Mauro [UNESP]2021-06-25T11:18:44Z2021-06-25T11:18:44Z2021-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1371/journal.pone.0235582PLoS ONE, v. 16, n. 6 June, 2021.1932-6203http://hdl.handle.net/11449/20877010.1371/journal.pone.02355822-s2.0-85107800526Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPLoS ONEinfo:eu-repo/semantics/openAccess2021-10-23T19:02:29Zoai:repositorio.unesp.br:11449/208770Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:29:51.504547Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
title Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
spellingShingle Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
Moreira, Pedro Vieira Sarmet [UNESP]
title_short Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
title_full Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
title_fullStr Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
title_full_unstemmed Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
title_sort Are isokinetic leg torques and kick velocity reliable predictors of competitive level in taekwondo athletes?
author Moreira, Pedro Vieira Sarmet [UNESP]
author_facet Moreira, Pedro Vieira Sarmet [UNESP]
Falco, Coral
Menegaldo, Luciano Luporini
Goethel, Márcio Fagundes [UNESP]
De Paula, Leandro Vinhas
Goncąlves, Mauro [UNESP]
author_role author
author2 Falco, Coral
Menegaldo, Luciano Luporini
Goethel, Márcio Fagundes [UNESP]
De Paula, Leandro Vinhas
Goncąlves, Mauro [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Coppe
Universidade Estadual Paulista (Unesp)
Tech4Fight Sports Technology
Food and Natural Sciences
Universidade Federal de Minas Gerais (UFMG)
dc.contributor.author.fl_str_mv Moreira, Pedro Vieira Sarmet [UNESP]
Falco, Coral
Menegaldo, Luciano Luporini
Goethel, Márcio Fagundes [UNESP]
De Paula, Leandro Vinhas
Goncąlves, Mauro [UNESP]
description The aim of this study is to analyze how isokinetic knee and hip peak torques and roundhouse kick velocities are related to expertise level (elite vs. sub-elite) in taekwondo athletes. Seven elite and seven sub-elite athletes were tested for kick-specific variables (KSV, composed of kinematic variables and power of impact) and for concentric isokinetic peak torque (PT) at 60°/s and 240°/s. First, KSVs and PTs were compared between groups, then PTs were correlated with KSVs. Parametric variables with larger effect sizes (Cohen's d) were entered in a stepwise linear discriminant analysis (LDA), generating an equation to estimate competitive level. Between-group differences were found in hip flexors (p = 0.04, d = 0.92) and extensors (p = 0.04, d = 0.96) with PT at 240°/s. Hip flexion PT at 60°/s and 240°/s correlated negatively with kick time (R =-0.46, p = 0.0499 and R =-0.62, p = 0.01 respectively). Hip flexion torque at 60°/s correlated positively (R = 0.52, p = 0.03) with peak linear velocity of the foot (LVF) and power of impact (R = 0.51, p = 0.03). Peak torque of hip extension at 60°/s and hip abduction at 240°/s also correlated with LVF (R = 0.56, p = 0.02 and R = 0.46, p = 0.0499). Hip extension at 60°/s correlated positively with peak linear velocity of the knee (R = 0.48, p = 0.04). The LDA showed an accuracy of 85.7% (p = 0.003) in predicting expertise level based on hip flexion and extension torques at 240°/s and on knee extension velocity during the kick. The study demonstrates that hip muscle strength is probably the dominant muscular factor for determining kick performance. Knee angular velocity combined with hip torques is the best discriminator for competitive level in taekwondo athletes.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-25T11:18:44Z
2021-06-25T11:18:44Z
2021-06-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1371/journal.pone.0235582
PLoS ONE, v. 16, n. 6 June, 2021.
1932-6203
http://hdl.handle.net/11449/208770
10.1371/journal.pone.0235582
2-s2.0-85107800526
url http://dx.doi.org/10.1371/journal.pone.0235582
http://hdl.handle.net/11449/208770
identifier_str_mv PLoS ONE, v. 16, n. 6 June, 2021.
1932-6203
10.1371/journal.pone.0235582
2-s2.0-85107800526
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv PLoS ONE
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
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reponame_str Repositório Institucional da UNESP
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