Good sleep can not only eliminate fatigue, make the human body generate new vitality, but also have a close relationship with improving immunity and resisting diseases. There is a health-preserving proverb: "If you don't sleep for one night, you won't wake up for ten nights". This means that if you don't sleep for one night, even if you sleep for ten nights, you can't make up for the loss of not sleeping for one night. Since it can't be made up, someone will come up with the idea of saving sleep, saying that they will stay up late tomorrow night, so it is unscientific to sleep more today and save tomorrow's sleep first. Because the human body can't store sleep, doing so will only disrupt the original normal physiological rhythm, and the next day it will become listless and work efficiency will be significantly reduced. There is a word called "Monday syndrome". It is precisely because of the experience of "sleeping" on weekends that everyone is dull and lifeless on Monday. Scientific research believes that there is indeed a clock in the human body, which controls the physiological functions of the human body, such as awakening and sleep, the rise and fall of blood pressure, the level of body temperature, disease and health. The regularity of this physiological activity is called "biological clock" by scientists. The traditional view of sleep is to rest only when you are tired. In recent years, the medical community has put forward a new concept of health preservation-biological clock health preservation. The core of this regimen is to take the initiative to rest and live regularly. Once the "dynamic stereotype" is formed, don't destroy or disturb it at will. In particular, don't disturb the long-established living habits at will, otherwise it will damage your health. The core of this regimen is active rest, that is, people can rest properly when they are not very tired. The purpose of active rest is to ensure adequate sleep and not stay up late. Good sleep can not only eliminate fatigue, make the human body generate new vitality, but also have a close relationship with improving immunity and resisting diseases. Therefore, people should ensure adequate sleep. No matter how busy they are at work, they shouldn't stay up late, let alone stay up late. If most of the sleep time is occupied, the body clock will be disrupted, causing a series of side effects, leading to a sharp decline in physical fitness. It is worth noting that not only sleep, but also other negative emotions will disrupt the operation of the biological clock and cause disorder. For example, when people are angry, their pulse, heart rate and breathing will accelerate, and sadness will reduce the digestive juice secreted by digestive glands and reduce their appetite. Fear and hatred will make the central nervous system tense, which will lead to an increase in blood pressure. Therefore, it is very beneficial to people's health to develop good regular living habits, live on time every day, work on time, eat regularly every day and defecate regularly. Maintain emotional stability and ensure the normal operation of the biological clock.