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在最大同心延伸和异心延伸后,青春期前男孩和男性之间的神经肌肉疲劳差异

Baptiste Chanel^1,2, Nicolas Babault^3,4, Carole Cometti^3,4

¹Centre d'Expertise de la Performance, Faculté des Sciences du Sport, Université Bourgogne Europe, 21000, Dijon, France. baptiste.chanel@u-bourgogne.fr.

European journal of applied physiology

|August 27, 2025

概括

青春期前的男孩在最大收缩过程中比男性更少的神经肌肉疲劳,这表明同心同心的运动适合年轻运动员. 这一发现突显了年龄组之间的疲劳耐力差异.

科学领域:

神经肌肉生理学
运动科学
儿童体育医学

背景情况:

了解神经肌肉疲劳的年龄相关差异对于优化年轻运动员的训练方案至关重要.
最大自愿收缩 (MVIC) 和电肌图活动 (EMG) 是神经肌肉功能和疲劳的关键指标.
异常 (ECC) 和同心 (CONC) 收缩引起不同的生理反应和疲劳模式.

研究的目的:

为了比较青春期前男孩和成年男性的神经肌肉疲劳的发展.
调查疲劳反应的异常和同心最大收缩.
评估年龄对扭矩产生和肌肉激活在疲劳过程中的影响.

主要方法:

12名青春期前男孩和12名男性参加了涉及CONC或ECC异动力疲劳方案的随机实验.
每个方案包括三组30次最大的异动力收缩.
在疲劳前和疲劳后测量了大侧骨 (VL) 和大腿直骨 (RF) 的最大自愿同位数收缩 (MVIC) 和电肌图学活动 (EMG).

主要成果:

无论收缩类型如何,男孩的MVIC扭矩在第二次和第三次收缩后显著下降.
在CONC会议期间,男孩在MVIC期间表现出较低的RFEMG,并在动态收缩期间减少扭矩.
在动态收缩期间没有观察到与年龄相关的EMG差异;在ECC会话中的差异不如CONC那样明显.

结论:

青春期前的男孩表现出比男性更低的神经肌肉疲劳,
对于青春期前的男孩来说, 集中和奇特的收缩似乎是有效的训练方式.
这些发现表明,在青春期前和成年人群中,培训适应可能有所不同.

关键词:

孩子们电肌图增长情况收回情况

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