It is best to run in the morning after a proper consumption of light and easy-to-digest breakfast, and then run after an interval of half an hour to an hour. Morning running should not be on an empty stomach, because running can promote gastrointestinal peristalsis, and fasting will have the phenomenon of empty grinding of the stomach, which will have some damage to the gastric mucosa. At the same time in the morning fasting is the lowest blood sugar in a day, running is easy to cause hypoglycemia. Also note that fasting exercise, fat in the process of decomposition will produce a large number of free fatty acids, the myocardium has an adverse effect, resulting in arrhythmia. Generally morning running can be arranged in about half an hour to an hour after meals, and it should be noted that it is not advisable to eat too much food, so as not to cause gastroptosis. And it is not recommended to run immediately after breakfast, when the blood circulation of the whole body will be mainly supplied to running, which will certainly hinder and affect the digestion of food in the stomach. It is recommended that morning running should be done according to one’s ability, and if there is any discomfort, it needs to be stopped in time.