频率问题:刺激频率对人类女性和男性力量损失的影响
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Updated: May 16, 2025
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Myo-mechanical Analysis of Isolated Skeletal Muscle
Published on: February 22, 2011
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Alexander D Paish1, Neil D Eves, Chris J McNeil
1Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Kelowna, British Columbia, CANADA.
Medicine and science in sports and exercise
|April 4, 2025
概括
在神经肌肉电刺激 (NMES) 期间更高的刺激频率会增加肌肉力量的损失,但没有发现显著的性别差异. 选择适当的NMES频率对于肌肉疲劳性协议至关重要.
科学领域:
- 肌肉生理学 肌肉生理学
- 神经肌肉电刺激 (NMES) 是一种神经肌肉电刺激.
- 运动科学运动科学
背景情况:
- 目前的NMES协议经常使用的频率超过了平均动力单元放电率 (MUDR).
- 对于NMES频率和力损失之间的关系,特别是不变的参数,需要进一步研究.
- 有限的研究存在于NMES期间力量损失的性别差异,发现可能取决于刺激频率.
研究的目的:
- 为了比较在不同NMES频率 (10,15和30Hz) 的电气引起的收缩过程中的力量损失.
- 评估在NMES过程中力量损失和收缩性特性变化的潜在基于性别的差异.
- 评估NMES频率对力量发展 (RFD) 和放松 (RFR) 速度的影响.
主要方法:
- 24名参与者 (12名女性) 在四头四骨上进行间歇性NMES.
- 在10 Hz,15 Hz和30 Hz的不同场合分别应用NMES3分钟.
- 力量损失,RFD和RFR被测量为最大自愿力的25%.
主要成果:
- 随着NMES频率的增加,力量损伤显著增加 (19.8%在10 Hz,42.6%在15 Hz,52.9%在30 Hz).
- 随着NMES频率的增加,力量发展和放松的速度大幅放缓.
- 对于任何频率的力损失,RFD或RFR,没有发现基于性别的显著差异.
结论:
- 刺激频率对NMES期间的肌肉疲劳性产生了深刻的影响.
- 电力引起的力损失和收缩性质的变化在两性之间没有差异.
- 精心选择NMES频率对于有效的肌肉刺激方案至关重要.
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