下肢血流封闭增加了全身压力反应,而没有增加关动脉血流再分配在女性
Abby R Fleming1, Hayley V MacDonald1, Samuel L Buckner2
1Department of Kinesiology, University of Alabama, Tuscaloosa, Alabama, USA.
Clinical physiology and functional imaging
|February 25, 2024
概括
在80%的肢体阻塞压力 (LOP) 下,女性的血流限制 (BFR) 会导致压力反应,而不会增加手臂的血流. 较低的压力 (50%的LOP) 显示出较轻的效果,表明对BFR强度有明显的生理反应.
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
- 运动医学 运动医学
背景情况:
- 关于血液流量限制 (BFR) 对全身血动力学和血管变化的影响的数据有限,特别是在女性中.
- 了解这些反应对于优化BFR协议至关重要.
研究的目的:
- 为了研究在休息期间和两次临床血流限制 (BFR) 压力 (50%和80%的四肢阻塞压力[LOP]) 后妇女的全身血动力学和血管变化.
- 检查BFR诱导的压力器响应和系统流量再分配的变化.
主要方法:
- 15名女性接受了两次随机的双边下肢BFR (50%或80%LOP) 8分钟,然后恢复8分钟.
- 重复测量ANOVA分析了心率 (HR),血压和血管测量 (动脉直径,平均速度,体积流量) 的变化.
- 重复测量相关性评估了血液动力学和血管反应之间的关联.
主要成果:
- 在80%的LOP,心率 (HR) 增加,而骨血流和速度下降. 在康复过程中,手臂动脉流量下降.
- 在50%的LOP下,HR在闭塞和恢复期间增加,与80%的LOP相比,压力反应较低.
- 较高的BFR强度 (80%LOP) 与HR和动脉流量的显著变化相关,这表明压力反射没有增加臂流.
结论:
- 妇女在80%的LOP下血流限制会引起急性全身压力反射,而同时不会增加臂动脉流量.
- 较低的BFR强度 (50%的LOP) 会导致压力器响应较低.
- 这些发现突显了女性对BFR的强度依赖的血液动力学和血管适应.
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