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What is the law of human biological clock?
The normal endocrine function of human body needs a rhythm of life that conforms to the laws of nature. Our daily activities such as sleeping, working and eating all have a 24-hour cycle, which is dominated by our internal biological clock (called "physiological clock" by some scientists).

Scientists not only discovered the mechanism of the relationship between the biological clock and sunlight, but also found the best scheme for human beings to adjust and adapt to the time difference by understanding the structure, mechanism and adjustment performance of the biological clock. Like going to bed early and getting up early every day. Because 7: 00 am to 8: 00 am is the most exuberant period of adrenal hormone secretion, so the work efficiency in the morning is relatively high; At noon, the secretion of adrenal hormones gradually decreases, especially after lunch, and the work efficiency is obviously reduced. If you can take a nap, you can relieve fatigue. 2: 00 pm to 4: 00 pm is another small peak of adrenal hormone secretion, so afternoon is also suitable for important work; At four or five o'clock, it is another trough; Adrenal hormone secretion drops to the lowest point at 12 pm, preferably before going to bed.

Therefore, people should arrange their own work and rest time according to the body's biological clock, so that the pace of life conforms to the physiological and natural laws of the human body, thus maintaining abundant energy, avoiding getting sick easily and making people look younger and more energetic. This is the best way to keep in good health. Of course, long-term night shift workers, such as medical staff, night shift editors, taxi drivers, etc. Keep the habit of sleeping during the day all the year round, as long as you meet the requirements of 7 hours of sleep, you can form your own normal life rules. Just like flying to a different time zone on the earth, the biological clock can't change to a new morning and evening rhythm immediately, and you will feel depressed and suffer from insomnia. When the biological clock is slowly adjusted to a new morning and evening rhythm, you can adapt. Insomnia is often due to the loss of the law of life, so most doctors do not advocate the use of sleeping pills. If you really can't sleep, you should use the right method to adjust it.