1, the human body at night is the time for all organs to rest and detoxify. If you get up at 4 o'clock, it will interrupt detoxification and force you to work again without a good rest of your organs. Toxins that can't be discharged will accumulate in organs, and if they accumulate to a certain extent, they will get sick.

2. Morning is the most unsuitable for human exercise. Scientific research shows that 16-20 is the most suitable for sports at night. 4 o'clock is the time for the brain to secrete various hormones, nerves and various organs to rest. Forcibly interrupting exercise will not only stop these beneficial activities, but also make it difficult for the body to enter the state of exercise. Even if you exercise, there will be no good exercise effect at all.

The air at 4 am is the worst of the day. Animals and plants do not carry out photosynthesis at night, but just breathe, that is, inhale a lot of oxygen and expel carbon dioxide. Therefore, the content of carbon dioxide is increasing at night, accumulating until 4 am, and the concentration reaches the highest point. At this time, to exercise and inhale a lot of carbon dioxide, the oxygen content is relatively small, which is equivalent to exercising in automobile exhaust. This kind of exercise can not only keep fit, but also endanger health.