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Comparison of Modular Control during Side Cutting before and after Fatigue

The purpose of this study was to clarify the coordination between the trunk and lower limb muscles during sidestep and to compare this coordination before and after fatigue intervention. The intervention was lateral jump until exhaustion. Nonnegative matrix factorization (NMF) was used to extract mu...

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Detalles Bibliográficos
Autores principales: Matsunaga, Naoto, Aoki, Kenta, Kaneoka, Koji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7808840/
https://www.ncbi.nlm.nih.gov/pubmed/33505517
http://dx.doi.org/10.1155/2021/8860207
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author Matsunaga, Naoto
Aoki, Kenta
Kaneoka, Koji
author_facet Matsunaga, Naoto
Aoki, Kenta
Kaneoka, Koji
author_sort Matsunaga, Naoto
collection PubMed
description The purpose of this study was to clarify the coordination between the trunk and lower limb muscles during sidestep and to compare this coordination before and after fatigue intervention. The intervention was lateral jump until exhaustion. Nonnegative matrix factorization (NMF) was used to extract muscle synergies from electromyography. Subsequently, to compare the muscle synergies, a scalar product that evaluates the coincidence of synergies was calculated. Three muscle synergies were extracted before and after the intervention from the NMF analysis. In accordance with the evaluation of the scalar product, these synergies were the same before and after the intervention. One of these synergies that engaged the internal oblique/transversus abdominis, rectus femoris, and adductor muscle was activated from before landing to midstance during sidestep motion; therefore, this synergy is thought to suppress excessive hip abduction. However, the activation timing of this synergy was delayed after the intervention (P = 0.028, effect size: 0.54, Wilcoxon test). This delay is considered to decrease hip stability. Thus, this change may induce a reduction in hip control function.
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spelling pubmed-78088402021-01-26 Comparison of Modular Control during Side Cutting before and after Fatigue Matsunaga, Naoto Aoki, Kenta Kaneoka, Koji Appl Bionics Biomech Research Article The purpose of this study was to clarify the coordination between the trunk and lower limb muscles during sidestep and to compare this coordination before and after fatigue intervention. The intervention was lateral jump until exhaustion. Nonnegative matrix factorization (NMF) was used to extract muscle synergies from electromyography. Subsequently, to compare the muscle synergies, a scalar product that evaluates the coincidence of synergies was calculated. Three muscle synergies were extracted before and after the intervention from the NMF analysis. In accordance with the evaluation of the scalar product, these synergies were the same before and after the intervention. One of these synergies that engaged the internal oblique/transversus abdominis, rectus femoris, and adductor muscle was activated from before landing to midstance during sidestep motion; therefore, this synergy is thought to suppress excessive hip abduction. However, the activation timing of this synergy was delayed after the intervention (P = 0.028, effect size: 0.54, Wilcoxon test). This delay is considered to decrease hip stability. Thus, this change may induce a reduction in hip control function. Hindawi 2021-01-07 /pmc/articles/PMC7808840/ /pubmed/33505517 http://dx.doi.org/10.1155/2021/8860207 Text en Copyright © 2021 Naoto Matsunaga et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Matsunaga, Naoto
Aoki, Kenta
Kaneoka, Koji
Comparison of Modular Control during Side Cutting before and after Fatigue
title Comparison of Modular Control during Side Cutting before and after Fatigue
title_full Comparison of Modular Control during Side Cutting before and after Fatigue
title_fullStr Comparison of Modular Control during Side Cutting before and after Fatigue
title_full_unstemmed Comparison of Modular Control during Side Cutting before and after Fatigue
title_short Comparison of Modular Control during Side Cutting before and after Fatigue
title_sort comparison of modular control during side cutting before and after fatigue
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7808840/
https://www.ncbi.nlm.nih.gov/pubmed/33505517
http://dx.doi.org/10.1155/2021/8860207
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