Practice before dinner. One is that it is suitable for exercise 2 hours after meals, but strenuous exercise 2 hours after meals is easy to cause insomnia. Exercise at 4 or 5 o'clock before meals. At this time, because people's metabolic level has dropped, you can once again raise your metabolic level to a peak through exercise, and the effect will be better, whether it is muscle training or weight loss. If you are a bodybuilder, I suggest you eat some dessert, such as bananas or a small cake, half an hour before exercise to ensure that you have enough strength and will not cause stomach upset.