Basic meaning: one is to continue to do things, work or engage in activities during the day until after midnight; The other is to rest during the day, concentrate on work or activities at night until after midnight, even the next day, for more than two days in a row, and so on. This is called "staying up late"!
"Do it at sunrise and rest at sunset." This is the result of human long-term adaptation to the environment. Staying up late will be harmful to your health. Because adrenocortical hormone and growth hormone are secreted at night.
The former is secreted before dawn, which can promote carbohydrate metabolism and ensure muscle development; The latter is produced after falling asleep, which not only promotes the growth and development of teenagers, but also delays the aging of middle-aged and elderly people. So the best time to sleep in a day is from 10 to 6 am.
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Precautions for staying up late:
1, we will feel very tired when staying up late, but no matter how tired, it is best not to sleep in the middle, just like a machine that suddenly turns on and off, which is very bad for our health. We must wait until things are finished before we have a rest.
2. If you are not busy when you are sleepy, you can drink some stimulating drinks such as coffee or tea to refresh yourself, but pay attention to hot drinks, and the concentration should not be too high, so as not to hurt your stomach.
3, when staying up late, the brain oxygen demand will increase, which is easy to cause endogenous hypoxia, so take a deep breath often.
4. When things are busy, be sure to accept your heart. Even if you don't sleep, sit in a chair and accept your heart.
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