静态运动期间肌肉代谢反射对鼻节调节的贡献:从心率波动的光谱分析的见解
F Iellamo1, P Pizzinelli, M Massaro
1Dipartimento di Medicina Interna, Università di Roma "Tor Vergata," Rome, Italy. iellamo@med.uniroma2.it
Circulation
|July 7, 1999
概括
肌肉代谢反射有助于通过同情激活在运动期间调节心率. 动脉巴罗反射机制解释了运动后的心率恢复,即使持续的肌肉代谢反射刺激.
科学领域:
- 心血管生理学心血管生理学
- 自主神经系统的调节规则
- 运动生理学 运动生理学
背景情况:
- 目前的理解表明,中央指挥主要通过静态运动期间的副交感撤回影响心率 (HR).
- 肌肉代谢反射被认为仅通过交感血管收缩来提高血压 (BP),因为BP保持高,而HR在运动后恢复.
- 这项研究研究了代谢反射在HR调节中的作用和巴罗反射在运动后HR恢复中的参与.
研究的目的:
- 通过同情激活测试肌肉代谢反射是否通过静态运动对静态运动中的心率调节作出贡献.
- 为了确定动脉巴罗反射是否影响运动后肌肉缺血期间心率恢复.
主要方法:
- 十一名健康的男性进行了静态腿部延伸 (SLE),随后进行了腿部循环停止 (ALC).
- 心率变化 (HRV) 谱分析评估了自主HR调节.
- 自发巴罗反射法评估了心脏周期的巴罗反射控制.
主要成果:
- 静态腿部延伸增加了HRV的低频组成部分,表明交感激活,在腿部循环停止期间持续存在.
- HRV的正常化高频组件在SLE期间下降,在ALC期间正常化.
- 在SLE期间,巴罗反射敏感性降低,在ALC期间恢复,与高血压和HR恢复相吻合.
结论:
- 肌肉代谢反射通过交感神经系统激活,在静态运动期间促进心率调节.
- 尽管正在进行的交感刺激,但运动后的胸可能是由于巴罗反射介导的副交感外流增加,超过了交感驱动.
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