It is recommended that running can be done two hours after eating, because if you exercise just after eating, it may lead to gastrointestinal discomfort and may even reflux the contents of the stomach. The reason for advocating running after two hours is that after two hours, the contents of the stomach are properly emptied. Because when you just finish eating, most of the blood is actually accumulated in the gastrointestinal tract. If you go to do strenuous exercise at this time, it is possible that the blood will be dispersed to the limbs, which will lead to the reduction of blood in the gastrointestinal tract, then it will affect digestion and lead to indigestion, and for a long time it may even cause symptoms such as gastroptosis. So it is recommended that it is best to do strenuous exercise after two hours after a meal, it will be better for the body.