在30分钟的步行中,下肢肌肉协调的变化与肌肉疲劳性没有差异
Jocelyn F Hafer1, Sarah A Roelker2, Katherine A Boyer2
1Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, USA.
Journal of biomechanics
|November 18, 2024
概括
在行走过程中肌肉协调与老年人疲劳的变化. 然而,这种变化的程度在那些或多或少易受肌肉疲劳的人之间没有差异.
科学领域:
- 老年学是一门学科.
- 生物力学 生物力学
- 发动机控制器的控制器
背景情况:
- 肌肉疲劳,肌肉力量的下降,限制了老年人的日常活动和身体功能.
- 改变肌肉协调是一个潜在的因素,导致疲劳导致的身体表现受损.
- 了解肌肉协调如何适应疲劳对于维持老龄人口的运动性至关重要.
研究的目的:
- 调查下肢肌肉协调在步行过程中的变化是否根据个体对疲劳 (疲劳性) 的敏感性而有所不同.
- 分析基线肌肉协调与老年人持续步行任务后肌肉协调的变化之间的关系.
- 为了确定特定的肌肉群,他们的协调模式最容易受到行走引起的疲劳的影响.
主要方法:
- 31名老年人接受了30分钟步行前后的肌肉力量评估,以确定疲劳性.
- 走路时的电肌图 (EMG) 数据使用非负矩阵因子化分析,以确定肌肉协调模块.
- 肌肉协调的变化是通过由基线模块 (tVAF) 和肌肉特异变异 (mVAF) 计算的EMG总变异来量化.
主要成果:
- 在30分钟的步行后,观察到肌肉协调 (tVAF) 的总体显著下降,表明肌肉活动模式发生了变化.
- 肌肉协调的整体变化在被分类为或多或少疲劳的参与者之间没有显著差异.
- 个体肌肉特异变异 (mVAF) 对膝盖伸缩器,膝盖曲器和脚背曲器的整体变化 (tVAF) 显示出显著的关联.
结论:
- 走路期间的肌肉协调在老年人中发生变化,以应对30分钟的步行.
- 步行过程中肌肉协调的变化程度并不取决于个体的疲劳程度.
- 特定的下肢肌肉,包括膝盖和脚肌肉,在老年人中表现出改变了与持续行走的协调模式.
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