使用固定刺激计数的电神经刺激,使用thenar肌肉的疲劳性,同时改变频率和工作周期
A Gkesou1, A Papavasileiou1, S Karagiaridis1
1School of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, Greece.
概括
不同的电刺激频率 (20-40 Hz) 不同地影响肌肉力量和神经肌肉传播. 像P40这样的更高频率与更长的间隔,在长时间的刺激过程中更好地保持肌肉力量和神经信号完整性.
科学领域:
- 神经肌肉生理学 神经肌肉生理学
- 运动生理学 运动生理学
- 生物医学工程 生物医学工程
背景情况:
- 电刺激用于唤起肌肉收缩.
- 优化刺激协议对于研究和治疗应用至关重要.
- 了解频率和工作周期对神经肌肉功能的影响至关重要.
研究的目的:
- 为了比较三种电刺激协议 (P20,P30,P40) 与不同频率和工作周期对肌肉力量和M波振幅的影响.
- 研究不同刺激参数如何影响神经肌肉疲劳和传播.
- 确定最佳的刺激参数,以保持肌肉力量和神经肌肉完整性.
主要方法:
- 十二名健康成年人接受了三项随机电刺激方案 (P20: 20 Hz,P30: 30 Hz,P40: 40 Hz),具有相同的刺激计数,但不同的工作周期.
- 在每个协议之前,期间和之后,在频率范围 (1-40 Hz) 上测量了肌的动力和M波振幅.
- 分析了数据,以比较跨协议的力减小和M波变化.
主要成果:
- 协议P20产生了最高的平均力,而P40显示了协议后力量的最低百分比下降.
- 与P20和P30相比,在较低频率 (1和10 Hz) 的强度在P40后下降较小.
- 在所有协议中,M波振幅显著降低,P30期间的最大降低,表明神经肌肉传播受损.
结论:
- 增加刺激频率可能会导致更大的力度下降,但较长的车间间间隔 (如P40) 可以减轻这种效应.
- 随着P40减少的M波振幅下降表明,刺激列车之间的较长间隔有助于保持神经肌肉传播.
- 刺激参数,特别是工作周期和训练间隔,显著影响神经肌肉疲劳和维持肌肉力量.
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