男孩-男孩平均功率-频率差异在逐渐运动到疲,混的变化性和肥胖度
Raffy Dotan1, Stacey Woods2, Jordan Langille2
1Kinesiology Department, Faculty of Applied Health Sciences, Brock University, St Catharines, ON, Canada. rdotan@brocku.ca.
European journal of applied physiology
|August 8, 2023
概括
与男性相比,男孩在消耗性运动中表现出不同的肌肉激活模式,较低的平均功率频率 (MPF) 表明运动单元招募和肌肉组成的差异,这有助于他们的耐力优势.
科学领域:
- 运动生理学 运动生理学
- 生物医学工程 生物医学工程
- 儿科 体育科学 儿童体育科学
背景情况:
- 有限的研究存在,比较儿童和成人在运动期间的平均功率频率 (MPF).
- 在比较研究中,MPF的高变化一直是比较研究的一个重大障碍.
- 这项研究旨在澄清MPF的特征,以区分男孩和男性在逐步彻底炼期间.
研究的目的:
- 为了研究在消耗性炼期间大侧肌的平均功率频率 (MPF) 与年龄相关的差异.
- 为了阐明MPF特征如何在男孩和男性之间有所不同.
- 通过分析其与耗尽时间 (TTE) 相对的模式来解决MPF的高变化.
主要方法:
- 电肌图 (EMG) 数据从17名男孩和20名男性中收集,这些男孩和20名男性在间歇性同度膝盖延伸过程中收集了数据.
- 使用第三阶多项式回归分析了MPF数据,并将其表达为峰值MPF的百分比 (%MPFpeak).
- 对MPF峰值进行了肥胖度校正,以估计肌肉水平的MPF.
主要成果:
- 与男性相比,男孩显示出较浅的MPF上升和下降,特别明显在50-70%和100%的时间到疲劳 (TTE).
- 在男孩 (125.7 Hz) 的MPF值明显低于男性 (166.0 Hz).
- 在所有%TTE间隔中观察到MPF的显著群体差异.
结论:
- 男孩显示肌肉水平的MPF值低于男性,即使在调整肥胖后也是如此.
- 在男孩中观察到的MPF模式与II型运动单元激活和组成差异理论一致.
- 这些发现支持这样一个观点,即儿童的生理特征有助于提高他们的肌肉耐力.
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