神经肌肉疲劳不会受到类似平均扭矩运动的收缩模式的影响
Loïc Lebesque1, Gil Scaglioni2, Patrick Manckoundia2,3
1INSERM UMR1093-CAPS, Université de Bourgogne, UFR Des Sciences du Sport, UFR STAPS, Campus Universitaire, BP 27877, F-21000, Dijon, France. loic.lebesque@u-bourgogne.fr.
European journal of applied physiology
|November 25, 2024
概括
当平均扭矩匹配时,消耗性同位体运动的收缩模式不会影响神经肌肉疲劳. 这一发现对于管理运动员和患者的肌肉疲劳很重要.
科学领域:
- 运动生理学 运动生理学
- 神经肌肉功能 神经肌肉功能
背景情况:
- 已知神经肌肉疲劳性是依赖于任务的.
- 不同的收缩模式对神经肌肉疲劳性的特定影响仍然在很大程度上未被探索.
研究的目的:
- 为了调查收缩模式是否会影响神经肌肉疲劳性,在耗尽的同位体运动.
- 为了确定不同的收缩类型 (间歇性,连续性,可变性) 在标准化平均扭矩时是否会影响疲劳水平.
主要方法:
- 十三名参与者执行了令人疲的同位数脚部 flexor 练习,直到任务失败.
- 练习包括间歇性 (INT),连续性 (CON) 和可变性 (VAR) 收缩在最大自愿收缩 (MVC) 的30%.
- 运动前后测量了最大自愿收缩 (MVC),通过1分钟的MVC时的扭矩损失评估了神经肌肉疲劳.
主要成果:
- 与连续和可变收缩相比,间歇性收缩带来了更长的运动时间和更高的扭矩-时间积分.
- 所有运动类型都同样降低了MVC,表明神经和肌肉损伤.
- 在1分钟的MVC期间,扭矩损失在所有运动类型中同样增加,主要是由于神经变化,并在恢复后恢复到基线.
结论:
- 当平均扭矩和耗尽水平相匹配时,收缩模式 (间歇性,连续性,可变性) 不会改变神经肌肉疲劳程度.
- 通过最大扭矩产生和可持续性评估的神经肌肉疲劳性,在这些条件下独立于收缩模式.
- 这些发现对为运动员设计有效的体育训练计划和为经历神经肌肉疲劳的患者设计康复策略具有重大意义.
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