Generally, you can eat breakfast only half an hour after the morning run. Half an hour rest after the morning run can make the distribution to the whole body blood circulation slow down, blood pressure, heart rate, breathing to restore calm, mood relaxation before eating, stimulate gastric acid secretion, conducive to food digestion and absorption. If the morning run to eat breakfast before may increase the burden on the stomach, causing gastric prolapse, intestinal cramps, vomiting, etc.. If you eat breakfast immediately after the morning run, it will make will cause indigestion. If you are hungry before the morning run, you can drink some honey water and supplement glucose to avoid hypoglycemia.