运动对心率的反应 紧紧的循环与分级的血流限制
Siu Nam Li1, Mohammed Ihsan2, Alex Shaykevich3
1School of Human Sciences (Exercise and Sport Science), The University of Western Australia, Australia.
Journal of science and medicine in sport
|July 2, 2023
概括
血流限制 (BFR) 在动脉阻塞压力的45%降低了循环功率输出. 较高的BFR (60-75%) 强化肌肉脱氧和在心率紧的运动中感知到的炼.
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
- 生物医学工程 生物医学工程
背景情况:
- 血流限制 (BFR) 训练是一种诱导肌肉适应的新方法.
- 了解骑自行车时对等级BFR的急性生理反应对于优化训练方案至关重要.
研究的目的:
- 为了研究不同血流限制 (BFR) 水平对机械输出,肌肉氧化和心率结循环期间感知反应的急性影响.
- 为了确定引起显著生理变化所需的BFR强度的门.
主要方法:
- 25名成年人经历了反复测量骑自行车的表现,在一个紧张的心率.
- 在每场6分钟的比赛中,BFR应用于0%,15%,30%,45%,60%,75%的动脉阻塞压力,用于每场6分钟的比赛的最后3分钟.
- 输出功率,氧和,肌肉氧化 (近红外光谱) 和感知反应被记录下来.
主要成果:
- 循环输出功率在BFR压力为动脉阻塞压力的45-75%时呈指数级下降.
- 肌肉脱氧 (脱氧血红蛋白) 在BFR的45-75%时显著增加.
- 感知到的劳累,疼痛和不适感在60-75%的BFR时显著增加.
结论:
- 至少需要45%的动脉阻塞压力,以减少在BFR循环过程中在第一个通风门时的机械输出.
- 较高的BFR强度 (60-75%) 进一步降低功率输出,增加肌肉脱氧,并加剧与运动相关的感觉.
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