在亚最大运动中对同情性克制的批判性评估:在运动中对综合心血管电路控制的影响
Patrick J Drouin1, Stacey P A Forbes1, Abby K Zedic1
1Human Vascular Control Laboratory, School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada.
运动肌肉中的同情性克制在亚最大运动期间可能不必要. 有证据表明,心脏输出量的增加,而不是同情的克制,与血流需求的增加相匹配,而不会影响血压.
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
- 自主神经系统功能 自主神经系统功能
背景情况:
- 主流观点认为,在炼肌肉时要有同情的克制,以防止过度的血管扩张.
- 这种抑制被认为是通过平衡心脏输出和外周血流来维持运动期间动脉血压的关键.
研究的目的:
- 重新检查在亚最大运动期间炼肌肉时对同情性克制的证据.
- 挑战运动期间心血管控制的"心脏中心"模型.
- 探索替代解释,使氧气供应与运动肌肉代谢需求相匹配.
主要方法:
- 审查现有的科学文献关于在运动期间的同情活动,血管扩张和心血管反应.
- 分析有关心脏输出,外周血流和动脉血压之间的关系的证据.
- 对氧气供应与运动肌肉代谢需求"紧密"匹配的批判性评估.
主要成果:
- 相当多的证据表明,健康个体的"过度"血管扩张会导致心脏输出量的补偿性增加,而不会影响动脉血压.
- 拟议的"心脏中心"模型暗示"设置"心脏输出反应,决定心血管流动和血管扩张.
- 质疑了精确传达肌肉代谢需求以驱动心脏激活的必要性.
结论:
- 当前对运动肌肉中的同情克制的理解需要重新评估.
- 关于同情性克制在亚最大运动中的作用的关键问题仍然没有得到答案.
- 对同情性克制的进一步调查可能会大大提高对运动期间综合心血管控制的理解.
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