Exercise after meals may be more energetic, but if it is at night, exercise after meals may be bad for sleep.
If you exercise before meals, it is recommended to rest for at least half an hour before eating. Generally speaking, blood flow after meals should be mainly supplied to the digestive tract. If you exercise immediately, it will lead to insufficient blood perfusion in your stomach, so you should not exercise immediately after meals.
Time control mainly depends on how light you are prepared to exercise: if you are prepared to run or do a lot of exercise, I suggest you do it at least one hour after meals; If you only do light shaping, it will take half an hour after dinner.
It is very recommended that you eat less before exercise, such as the amount of a steamed stuffed bun, which can not only maintain your physical strength, but also not burden your stomach.