Although running on an empty stomach can burn more fat, it can also "theoretically" help people lose more fat. But judging from real experiments, the complex operation of the human body has surprised experts.

Don’t eat too much food within an hour before running. Because your body also needs to consume energy and time to digest the food you eat, which will allow the blood to transport more oxygen and energy to the stomach. That is, the oxygen and energy distributed to your muscles in a short period of time after a meal will become smaller.

If the time of eating and running is too close, the food will not be fully digested, but will roll up and down in the stomach during running, which will make people feel uncomfortable and even nauseated. Doing so can easily cause abnormal gastric acid secretion, and may even cause stomach pain when you run.