First of all, sleep helps to restore physical strength. During sleep, the gastrointestinal tract and various organs constantly synthesize and produce some nutrients to help us recharge. Body temperature, heart rate, blood pressure and other basic vital signs decreased slightly, respiration and some endocrine decreased, and basal metabolic rate was low. At the same time, our physical strength has also recovered.

Second, sleep can supplement brain power, and the oxygen consumption of the brain during sleep is reduced, which is conducive to the repair and energy storage of brain cells. Therefore, sleep can protect the brain, improve brain power, strengthen memory and regulate the working function of the brain.

Thirdly, sleep can regulate mood, which is very important for protecting people's psychological state and maintaining normal psychological activities. Sleep can regulate emotions, relieve psychological pressure, dilute the adverse effects of bad emotions on people, make our whole mental state in a very peaceful state, and regulate our emotions.

Fourth, sleep can enhance immunity. Under normal circumstances, the human body can produce antibodies against various invasive antigens and destroy them through immune reaction, thus protecting human health. Sleep can enhance the body's ability to produce antibodies, thus enhancing the body's resistance.

Proper rest is the best way to adjust, and of course it is also a good way to keep fit!