休息期间的巴罗反射动态在人类的急性诺莫巴里克缺氧中暂时炼
Anna Taboni1,2,3, Nazzareno Fagoni4,5, Timothée Fontolliet5
1Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, Brescia, Italy. anna.taboni@unibs.it.
European journal of applied physiology
|April 24, 2024
概括
运动期间的缺氧暴露会导致巴罗反射灵敏度 (BRS) 和类似的心率 (HR) 和心力输出 (CO) 响应的较快下降,而不是normoxia. 这表明在缺氧时,同情驱动力增加和阴道活动减少.
科学领域:
- 心血管生理学心血管生理学
- 运动生理学 运动生理学
- 缺氧研究 缺氧研究
背景情况:
- 身体对运动的心血管反应涉及到复杂的神经调节.
- 巴罗反射敏感性 (BRS) 在生理压力期间在维持血压方面发挥着至关重要的作用.
- 缺氧可以显著改变自主神经系统功能和心血管调整.
研究的目的:
- 为了研究缺氧对休息到运动的过渡期间的巴罗反射灵敏度 (BRS) 的影响.
- 为了比较心率 (HR) 和心力输出 (CO) 响应在休息至运动过渡期的正常氧和缺氧.
- 为了确定缺氧中阴道活动减少是否会影响初始心血管对运动的反应.
主要方法:
- 十名参与者在正常和缺氧条件下接受了休息至50W的自行车运动过渡.
- 使用非侵入性心电图和光电图来记录R-to-R间隔 (RRi) 和血压.
- 计算了平均动脉压 (MAP),中风体积 (SV) 和心脏输出 (CO),并使用修改序列方法确定了BRS.
主要成果:
- 在normoxia中,BRS从休息到50W运动显著下降.
- 在缺氧时,与正常氧相比,BRS在运动开始时表现出更快,更明显的下降.
- 心率和心脏输出对运动反应的初始幅度在正常和缺氧条件之间是相似的.
结论:
- 这些发现表明,在缺氧运动期间,BRS会立即降低.
- 在这两种情况中,类似的快速心率和心脏输出响应表明缺氧时阴道活动的显著退出.
- 这些反应与在低氧环境中炼期间同情力驱动的增加一致.
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