运动引起的疲劳对举重任务中的神经肌肉控制策略的影响:基于波束包转换的肌肉协同研究
Zixin Wang1, Chenxi Hu1, Yanfeng Li2
1Sport Biomechanics Center, Institute of Artificial Intelligence in Sports, Capital University of Physical Education and Sports, No. 11 North Third Ring Road West, Beijing 100191, PR China.
Human movement science
|June 24, 2025
概括
运动引起的疲劳会在重复的举重任务中影响肌肉协同作用. 高频带显示出更大的疲劳效应,特别是在前 (TA) 和下起器脊柱 (LES) 肌肉模块中.
科学领域:
- 生物力学 生物力学
- 神经科学是一个神经科学.
- 职业健康 职业健康 职业健康
背景情况:
- 重复举重会导致腰部疼痛,疲劳是关键的危险因素.
- 通过使用表面电肌图 (sEMG) 评估通过肌肉协同作用的神经肌肉控制,在运动诱导的疲劳方面缺乏研究.
- 了解疲劳下肌肉协同作用的变化对于预防工作场所伤害至关重要.
研究的目的:
- 在重复的举重任务中调查肌肉协同模式.
- 探索运动引起的疲劳对这些肌肉协同模式的影响.
- 分析在疲劳下肌肉协同作用的频率依赖性变化.
主要方法:
- 采用波束包转换 (WPT) 和非负矩阵分解 (NNMF) 来分析sEMG信号.
- 招募了11名参与者进行重复举重,直到主观疲劳.
- 确定了与举重任务相关的三个不同的肌肉协同模块.
主要成果:
- 一个涉及前 (TA) 和下起器脊柱 (LES) 的特定模块显示出更高的激活,这表明神经控制更强.
- 标准NNMF方法没有显示疲劳对整体肌肉协同作用的显著影响.
- 在WPT-NNMF方法中,在不同频段和协同模块中显示出不一致的疲劳效应.
- 疲劳对肌肉协同效应的影响随着频率波段的提高而增加,特别是影响TA和LES模块.
结论:
- 运动引起的疲劳会在重复举重时以频率依赖的方式改变肌肉协同模式.
- 前 (TA) 和下起器脊柱 (LES) 肌肉模块对更高频率的疲劳效应特别敏感.
- 这项研究强调了频率分析在理解职业环境中与疲劳相关的神经肌肉适应方面的重要性.
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