If you are trying to exercise and can't lose weight, it doesn't matter before and after meals, but it's best to eat after exercise 1 hour, because eating just after exercise can easily lead to a rapid increase in blood sugar; If you exercise after meals, it is best to exercise 2 hours after meals, so as not to affect the digestion of food and cause nausea and nausea. If your goal is to lose weight, I suggest you exercise before meals, because fasting exercise is more conducive to the consumption of blood sugar and fat as soon as possible, so as to achieve the purpose of losing weight.