In fact, this question is very simple. Walking after a meal can help digestion and is good for your health, but it is not suitable for strenuous exercise. Exercise before meals depends on whether your stomach is hungry. Generally, when you feel hungry, exercise will cause syncope and lower blood sugar. But before meals, you are in good health and can exercise properly. To tell the truth, there is no difference between good and bad exercise before and after meals. In Sina blog "Hot Mom has Attitude", I said that the best way to lose weight is to eat healthily and keep exercising!