If it is a regular exercise, non-marathon long-distance running, it is better to run in the morning on an empty stomach, before running can be appropriate to drink some warm water or appropriate hydration during the running process. If you are running after meals, it is recommended that it is best to run more than 1 hour after meals, and not to eat too much. Because in the running process, the body skeletal muscle system blood circulation will accelerate, sympathetic nerves will be excited, digestive juices digestive enzyme secretion will be significantly reduced, from the impact of food digestion and absorption, and will produce stomach discomfort and even abdominal pain.