在低负荷耐力训练中对咖啡因补充的神经肌肉适应与血流限制
Yen-Ting Lin1, Ching-Lin Wu2, Chia-Chan Wu3
1National Taiwan University of Sport, Department of Ball Sport, Taichung City, Taiwan.
Journal of the International Society of Sports Nutrition
|September 16, 2025
概括
将咖啡因与血液流量限制 (BFR) 训练相结合并没有增强强度,但提高了力控制精度. 这表明咖啡因可能在BFR阻力运动期间优化运动单元活动.
科学领域:
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
- 神经肌肉适应的过程
背景情况:
- 血流限制 (BFR) 阻力训练增强肌肉力量,但可以增加因缺氧而导致的疲劳.
- 咖啡因是一种常见的 ergogenic 辅助剂,有可能增加训练效益.
研究的目的:
- 调查是否将咖啡因与BFR抵抗训练相结合,提供了超出单独BFR的额外好处.
- 评估咖啡因在BFR训练期间对力量,力量控制和神经肌肉活动的影响.
主要方法:
- 在年轻的成年人中进行了为期4周的低负荷阻力训练计划,用于手腕伸缩器.
- 参与者被分为两个组:BFR (n=14) 和咖啡因的BFR (BFRC,n=14).
- 训练涉及20%的最大自愿收缩 (MVC) 与闭塞;BFRC在一小时前消耗了6毫克·公斤-1咖啡因. 在前后测试中测量了MVC和力控制精度.
主要成果:
- 两组均显示MVC和力控制精度的比较提高 (p > .05).
- 在BFRC组显示,力波动大小显著减少,力释放过程中复杂性增加 (p ≤ .036).
- 此外,BFRC还显示了动力单元放电变异性降低和力释放期间更高的平均放电频率 (p ≤ .023).
结论:
- 在未受过训练的个体中,咖啡因在BFR训练4周后不会显著增强同度强度.
- 咖啡因通过减少运动单元放电变化来提高BFR训练期间的力释放精度.
- 研究结果表明,咖啡因可以优化神经肌肉控制,而不是仅仅增加强度适应在这种情况下.
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