According to scientific theory, the best exercise time should be from 5 pm to 9 pm. In fact, people's muscles are not fully stretched when they get up in the morning. This time is not suitable for sports. At best, they can do Tai Ji Chuan and other peace exercises. After nine o'clock in the evening, people's muscles begin to enter a state of fatigue again. And this time is not suitable for sports. Exercise excites your muscles and makes you fall asleep at night, so you exercise around 12. Exercise is unscientific. If possible, you should advance the time. During this time, you can grow your muscles more effectively. I'm a fitness instructor. I won't lie to you.