Science thinks it's half an hour. Because the human body, especially the stomach and intestines, needs a stable environment to digest food after eating. If you exercise immediately, you are prone to gastrointestinal diseases such as gastroptosis. Don't sit down after lunch or dinner, because many people are used to sitting down and watching TV or simply lying down after dinner, which will put pressure on their stomachs and make girls fat. After eating, you can stand first and gently massage your stomach to help digestion. You can take a walk after half an hour, but you can only do strenuous exercise after 1-2 hours when you feel full.