延迟神经肌肉疲劳恢复揭示了在最大间歇性运动后,老年人疲劳耐受性降低
Slim Zarzissi1, Firas Zghal2, Mustapha Bouchiba2
1High Institute of Sport and Physical Education, Education, Motor Skills, Sport and Health (EM2S) Laboratory, University of Sfax, LR19JS01, Sfax, Tunisia. zarzissislim@gmail.com.
European journal of applied physiology
|May 17, 2024
概括
衰老会降低神经肌肉疲劳抵抗力,但会影响恢复. 老年人运动后表现出较少的外周和中心疲劳,但他们的最大自愿收缩 (MVC) 和外周功能的恢复明显比年轻人慢.
科学领域:
- 神经肌肉生理学 神经肌肉生理学
- 衰老研究研究 衰老研究
- 运动科学 运动科学
背景情况:
- 神经肌肉疲劳和恢复过程对于维持身体功能至关重要.
- 衰老与肌肉力量,耐力和神经控制的变化有关.
- 了解疲劳和恢复的年龄相关差异对于优化老年人健康和表现至关重要.
研究的目的:
- 为了研究衰老对间歇性最大同位体运动中神经肌肉疲劳发展的影响.
- 评估疲劳性运动后神经肌肉功能恢复的年龄相关差异.
- 分析年轻人与老年男性中对疲劳和恢复的中心和外围贡献.
主要方法:
- 十个年轻 (平均年龄~23岁) 和十个年长 (平均年龄~61岁) 的男性参与.
- 参与者进行了间歇性最大同度膝盖伸展器运动,随后27分钟的恢复时间.
- 测量包括最大自愿收缩 (MVC),自愿激活 (VA),潜在休息抽 (Ptw) 和电肌图 (EMG).
主要成果:
- 与运动后的年轻人相比,老年人表现出较低的外周和中心疲劳.
- 尽管工作量较少,但RMS/Mmax的减少在各年龄组之间是相似的.
- 在老年人中,神经肌肉恢复,包括MVC和外周功能,在27分钟内显著受损和不完整.
结论:
- 老年人运动后疲劳的降低表明增强了疲劳抵抗力.
- 老年人中神经肌肉恢复延迟和不完全表明疲劳耐受性降低.
- 与衰老相关的收缩性质和/或中枢神经系统功能的变化可能是疲劳和恢复的这些差异的基础.
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