睡眠质量是关键。睡眠呼吸终止症——睡觉时由于呼吸的暂停而周期性苏醒的现象——与心血管病有很大关联。

However, quality of sleep is key. Sleep apnea-a condition in which you wake up periodically due to interrupted breathing-has been linked with cardiovascular disease.

youdao

正常睡眠的时间里，人体能保持较低的激素水平和血压。而半夜由睡梦中因为呼吸暂停醒来的人就不能继续正常的睡眠周期。

People who awake in the middle of the night from sleep apnea are unable to complete normal sleep cycles, a time when the body naturally lowers hormone levels and blood pressure.

youdao

首先，中枢神经必须赋予呼吸肌的周期性收缩和放松一种节奏。

First, the CNS must produce a rhythm for the periodic cycle of contraction and relaxation of respiratory muscles.

youdao