生物钟助眠。现代医学研究认为,人的睡眠受体内生物钟所控制,人在一天之内有两个睡眠峰值期。第一个峰期位于凌晨1点左右,为主要峰期;第二个峰期位于午后1点左右,为次峰期。顺应人体生物钟的规律适时而眠,才能提高睡眠质量。醒后才会感到神清气爽,精力充沛。反之,若当眠不眠,就会感到精神疲惫,全身无力,甚至神志恍惚。因此,夏日午睡不仅是弥补昼长夜短所造成的睡眠不足,还能解除因饭后血液再分布引起大脑供血不足所导 Biological clock to help sleep. Modern medical research suggests that human sleep is controlled by the circadian clock in the body and that people have two periods of peak sleep during the day. The first peak is located around 1:00 am, the main peak; the second peak at about 1 o’clock in the afternoon, the second peak. Conform to the laws of the human body clock and sleep in time, can improve the quality of sleep. Will wake up awake, energetic. On the contrary, if you sleep without sleep, you will feel tired, weak, and even unconscious. Therefore, the summer nap is not only to make up for lack of sleep caused by short days and night, but also to relieve the redistribution of blood caused by insufficient blood supply to the brain