在整个怀孕期间,心血管和交感神经反应对静态握手运动的纵向变化
Takuro Washio1,2, Sarah L Hissen1,2, John D Akins1,2
1Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, Texas, United States.
概括
怀孕改变了运动反应,怀孕后期同情神经活动减少. 然而,心脏输出量增加,在炼期间保持血压,无论出现什么并发症.
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
- 自主神经系统的自主神经系统
背景情况:
- 怀孕的特点是显著的血液动力学和交感神经系统的改变.
- 怀孕对运动压力反应,特别是神经控制的影响尚不清楚.
- 之前的研究表明,怀孕期间同情激活的潜在变化.
研究的目的:
- 纵向研究心血管和交感神经反应在整个怀孕期间对静态握手运动的时间过程.
- 为了测试这个假设,神经对运动的反应是增强的,特别是在怀孕后期.
- 检查肥胖和怀孕并发症对这些运动反应的影响.
主要方法:
- 在怀孕早期,怀孕后期和产后期间对46名妇女进行了长度研究.
- 测量包括平均动脉压 (MAP),心率 (Qc),周围总阻力 (TPR) 和休息和疲劳静态握手 (SHG) 运动期间的肌肉交感神经活动 (MSNA).
- 运动后循环阻塞 (PECO) 用于隔离肌肉代谢反射.
主要成果:
- 在疲劳性SHG期间MAP的增加在妊娠阶段没有差异.
- 在怀孕晚期,对SHG和PECO的心脏输出 (Qc) 响应增加,而总周围电阻 (TPR) 较低.
- 在PECO期间,肌肉交感神经活动 (MSNA) 在怀孕晚期相比怀孕早期和产后减少,这表明代谢反射反应减弱.
结论:
- 通过肌肉代谢反射的交感神经激活在怀孕晚期减少,可能是由于周围血管收缩变.
- 在怀孕后期运动期间心脏输出响应增加有助于保持足够的压力反应.
- 心血管和神经适应运动发生在整个怀孕期间,与不同的中央和外围调节机制确保适当的运动压力反应,无论肥胖或并发症.
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