Comparison of Modular Control during Side Cutting before and after Fatigue

Naoto Matsunaga*, Kenta Aoki, Koji Kaneoka

*この研究の対応する著者

研究成果: Article査読

抄録

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.

本文言語English
論文番号8860207
ジャーナルApplied Bionics and Biomechanics
2021
DOI
出版ステータスPublished - 2021

ASJC Scopus subject areas

  • バイオテクノロジー
  • 医学(その他)
  • バイオエンジニアリング
  • 生体医工学

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