The time period of 9-10 p.m. is a little too late to consider exercising. The main reason is that after the exercise needs to have an hour or so of recovery time, because the exercise itself is too late, plus the recovery time, be sure to cause sleep time is too short. It is recommended that it is best to choose 8-9 o’clock this time to exercise, the right amount of exercise every day before bed can play a role in improving sleep and increasing the quality of sleep. But the amount of exercise and the time period of exercise should be mastered, otherwise it will have a detrimental effect on the body, but not for the health of the body.