血流限制训练在低强度持续运动期间激活肌肉代谢反射
Joseph Mannozzi1, Mohamed-Hussein Al-Hassan1, Jasdeep Kaur2
1Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan, United States.
Journal of applied physiology (Bethesda, Md. : 1985)
|June 22, 2023
概括
血流限制训练 (BFRT) 可以导致血压和同情活动的显著增加,这是由于运动期间肌肉代谢反射的激活. 建议谨慎使用,特别是对于容易发生心血管不良事件的个人.
科学领域:
- 运动生理学 运动生理学
- 心血管生理学心血管生理学
- 肌肉的新陈代谢
背景情况:
- 众所周知,血流限制训练 (BFRT) 可以提高肌肉性能和增大,而训练时间和强度则减少.
- 在BFRT运动方案中心血管血液动力学反应尚不清楚,因为测量通常是在运动前后进行的.
- 在BFRT期间减少肌肉输液可能会激活肌肉代谢反射,可能导致显著的心血管调整.
研究的目的:
- 为了研究血液流量限制训练 (BFRT) 练习期间急性心血管血动力学变化.
- 确定BFRT是否激活肌肉代谢反射及其对血压和心脏输出的影响.
- 评估与心血管功能受损的个体中BFRT相关的潜在风险.
主要方法:
- 使用具有慢性仪器的狗模型来模拟BFRT条件.
- 在稳定状态跑步机运动 (3.2公里/小时) 中,股骨血压降低了60%的后肢.
- 测量了血液动力学参数,包括心率,中风量,心脏输出,平均动脉压和血管导电.
主要成果:
- 观察到心率 (+19±3bpm),中风体积 (+2.52±1.2 mL) 和心脏输出量 (+1.21±0.2 L/min) 的显著增加.
- 平均动脉压增加了+18.2±2.4 mmHg,表明了压力反应.
- 非缺血性血管导电性增加 (+3.62±1.7mL/mmHg),表明交感激活和肌肉代谢反射.
结论:
- 低强度的血流限制训练 (BFRT) 可以引起显著的反射心血管反应,包括通过肌肉代谢反射激活提高血压和同情活动.
- 这些发现强调了在BFRT期间考虑潜在的夸大心血管反应的重要性,特别是在风险人群中.
- 建议在实施BFRT时谨慎使用,特别是在因潜在危险的血液动力学转移而容易发生心血管不良事件的个体中.
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