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神経筋疲労は,足の外部の力を制御する際に力の反応を低下させる
Pawel Kudzia1, James M Wakeling2, Stephen N Robinovitch2
1Department of Engineering Science, Simon Fraser University, Burnaby, British Columbia, Canada.
Physiological reports
|August 22, 2025
まとめ
神経筋疲労は 足の力の調整を遅らせますが 敏捷な動きの間では 正確さを維持します これは神経系が 筋肉の強さが低下したにも関わらず 正確さを保つのに 補償策を用いることを示唆しています
科学分野:
- 神経筋制御
- バイオメカニクス
- 運動学習
背景:
- 敏捷な動きは,地面反応力の正確な制御に依存しています.
- この力の調節に対する神経筋疲労の影響は完全に理解されていません.
研究 の 目的:
- 脚の筋肉の疲労が 垂直地面反応力を調節する神経系の能力に どう影響するか調べる
- 疲労が力制御の反応や精度を損なうかどうかを判断する.
主な方法:
- 18人の健康な参加者は 特別な装置を使って 力を合わせる作業を行いました
- 疲労は持続的な最大下収縮によって引き起こされた.
- 応答性 (上昇時間,帯域幅) と精度 (オーバーショット,安定状態誤差,可変性) は,疲労前と疲労後で定量化されました.
主要な成果:
- 最大自発収縮力 (MVC) は26. 1%減少した.
- 応答性が低下し,上昇時間が増加 (23. 3%) 帯域幅が減少 (25. 2%) した.
- フォースコントロールの精度はほとんど変わらず,オーバーショットが一時的に減少しただけです.
結論:
- 神経筋疲労は 選択的に足の力調整の速度を低下させます
- 力の制御の精度は,補償神経戦略によって保存されます.
- この解離は,疲労時の運動制御の欠陥と怪我のリスクを理解するための意味を持っています.
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