2 1: 00 ~ 23: 00 is the detoxification of immune system.

23: 00 ~ 65438+ 0: 00 am is the liver detoxification, which needs to be carried out while sleeping.

1: 00 ~ 3: 00 am is the time to detoxify the large intestine.

From 7 am to 9 am, the small intestine absorbs a lot of nutrients.

From the perspective of health care, sleep should follow the principle of "nourishing yang in spring and summer and nourishing yin in autumn and winter", "going to bed late and getting up early" in spring and summer and "going to bed early and getting up late" in autumn and winter.

Adults spend about 8 hours a day; Teenagers 9.5 hours a day; 5 to 7 hours for the elderly; The number of infirm people has increased appropriately.

The researchers also found that people who sleep more than 10 hours a day are twice as likely to die of heart disease as those who sleep for 7 hours. So don't sleep too much.