动脉压和二氧化碳的动态变化对高强度间歇运动期间中脑动脉血速的影响
Eric T Hedge1,2, Andrew D Robertson1,2, Richard L Hughson1
1Schlegel-UW Research Institute for Aging, Waterloo, Ontario, Canada.
Journal of applied physiology (Bethesda, Md. : 1985)
|October 7, 2025
概括
大脑自调节在高强度间歇运动 (HIIE) 中得到改善,因为二氧化碳的估计部分压力下降. 在HIIE期间更短的恢复间隔可能会增加大脑的血压峰值.
科学领域:
- 运动生理学 运动生理学
- 神经科学是一个神经科学.
- 心血管生理学心血管生理学
背景情况:
- 已知在较低的二氧化碳 (PCO2) 部分压力下,大脑自调节,即大脑维持血流的能力,尽管压力变化,也会增强.
- 在高强度间歇运动 (HIIE) 期间,PCO2逐渐减少,可能会影响脑血管控制.
研究的目的:
- 研究大脑血管控制,特别是大脑自我调节在HIIE发作期间如何发生变化.
- 为了测试大脑自我调节在HIIE晚期阶段改善,当估计的PCO2减少时,这一假设.
主要方法:
- 14名健康成年人进行了18.5分钟的伪随机HIIE.
- 自动回归移动平均线 (ARMA) 分析被用来量化大脑自动调节和大脑血管对二氧化碳的反应性,在运动的第一和第二半段.
主要成果:
- 平均动脉压,估计的PCO2和中脑动脉血流速度在HIIE的上半年比下半年更高.
- 大脑自调节,以中脑动脉血速相对于平均动脉压的较低平稳状态变化为标志,在HIIE的下半年得到改善.
- 中脑动脉血流速度的短暂增加与血压峰值有关,这些峰值在恢复间隔较短时更加明显.
结论:
- 大脑血管调节在HIIE期间动态变化,随着估计的PCO2下降,在后期阶段观察到大脑自我调节的改善.
- 在HIIE协议中,运动强度和恢复时间的模式可以影响血压变化的传输到大脑.
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