At 23 o'clock, people's normal biological clock is already in a state of inhibition or about to be inhibited. At this time, people's muscle and cardiovascular system capabilities will decline, and exercise efficiency will also decline.

2. For the same reason as above, at the same time, the possibility of sports injury increases due to the decrease of people's reaction ability.

3. Exercise too late makes people's sympathetic nerves excited and parasympathetic nerves inhibited, which affects their next sleep and causes the phenomenon that they are tired but can't sleep.

So it is not recommended that you do such strenuous exercise at night.