2, less sleep, more diseases. Long-term lack of sleep will also affect brain function and increase the risk of dementia. Studies have found that people who sleep less than 7 hours have three times the incidence of colds as those who sleep enough for 7 hours.
3. Physical repair requires different stages of sleep. The first stage is between waking and sleeping, which is a state of relaxation, with slow breathing, relaxed muscles and slow heart rate; The second stage is a deep sleep state, feeling awake, but actually asleep; The third stage is a deep sleep stage, which makes it difficult to wake up and the body is the least active.
Precautions for sleep:
1, normal people sleep for 6-8 hours (children sleep for about 10- 12 hours, and infants sleep longer; Old people sleep less.
2. The time for beauty sleep is from 22 o'clock to 2 o'clock in the morning.
3, staying up late for a long time, even if you sleep for 8 hours, it will be easy to endocrine disorders in a few years, and the physiological clock will be disrupted.
Children had better go to bed before 20:30 in the evening, because they have grown up.
Teenagers should go to bed around 22 o'clock in the evening.
6. As for those who love beauty, they must go to bed before 2 am, because the skin is metabolized before 2 am.
7. The elderly should sleep between 2 1-22 at night.
8. Insist on habitual activities before going to bed. Do some habitual activities before going to bed: drink herbal tea, drink milk, take a bath, keep a diary or listen to music for a while. Try to eat less indigestible or greasy or irritating food at night, and don't drink alcoholic or caffeinated drinks 2 hours before going to bed.
9. Don't do strenuous exercise before going to bed. If you have the habit of exercising in the evening or evening, you should exercise 4 hours before going to bed. Don't go to bed with problems. If there is any problem that can't be solved at the moment, you can write it down and think about it the next day.
People's Network-Sleep, Ten Things You Should Know