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有关税率的问题吗? 发动机单元发射速度的女孩和女性之间的差异

Caragh O'Mahoney¹, Stacey Woods¹, Andrew McKiel¹

¹Department of Kinesiology, Brock University, St. Catharines, ON, L2S 3A1, Canada.

European journal of applied physiology

|July 15, 2025

概括

与年轻女性相比,女孩在膝盖延伸过程中表现出不同的运动单元 (MU) 激活模式. 他们显示较低的MU射击率,并在更窄的范围内招募MU,可能招募更多的MU.

科学领域:

神经肌肉生理学神经肌肉生理学
发育运动学发育运动学
生物机械分析分析

背景情况:

运动单元 (MU) 激活模式对于力量产生和肌肉控制至关重要.
了解MU激活的年龄相关差异对于理解运动性能的发育变化至关重要.
之前的研究主要集中在成年人群中,这使得有关儿科运动控制的知识存在差距.

研究的目的:

为了研究与年龄相关的运动单元 (MU) 激活模式的差异,在膝关节延伸的女性.
为了比较年轻女性和女孩之间的MU解雇率 (MUFR) 和招聘门 (RT).
阐明发展阶段之间神经肌肉策略的潜在差异.

主要方法:

表面电肌图 (sEMG) 记录了从巨大的侧面在年轻女性 (22.1±1.5岁) 和女孩 (9.8±0.8岁) 的同位测膝盖延伸期间.
分解了sEMG信号,以计算MU发射率 (MUFR) 和招聘值 (RT).
使用多级建模来评估MU激活模式的群体差异,控制最大力量 (MVC) 和身体大小.

主要成果:

女孩的最大强度 (MVC) 比年轻女性要低得多,即使在体重正常化后.
MUFR-RT关系的y截面在女孩中明显较低,这表明在招募范围内的MUFR较低.
与年轻女性相比,女孩在一个显著更窄的RT范围中招募了MU,具有较低的最高确定RT (%MVC).

结论:

女孩和年轻女性在高强度膝盖延伸过程中使用不同的运动单元 (MU) 激活方案.
与年轻女性相比,女孩的MU解雇率 (MUFR) 较低,并且在更有限的招聘门 (RT) 范围内招聘MU.
这些发现表明,女孩可能需要在更窄的范围内招募更多的可用MU,以实现类似的力量输出,可能是由于神经肌肉控制的发育差异.

关键词:

孩子孩子孩子孩子雌性雌性雌性成熟成熟成熟成熟成熟肌肉表现的表现是肌肉的表现.这是神经肌肉.

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