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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi
2021
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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. |
format | Online Article Text |
id | pubmed-7808840 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
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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