Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

要远离打鼾，我们要先知道鼾声从何而来。当人入睡后，颈部肌肉逐渐放松，导致上呼吸道变得狭窄，无法让足够的空气进入肺部。由于气体流通受阻，当人吸气和呼气时，上呼吸道周围的软组织就会产生振动，形成鼾声。气道越窄，振动幅度越大，鼾声就越大。另外，鼻中隔偏曲、 ...