Running without eating at night can help to lose weight. Not eating at night can reduce the calorie food intake and reduce the obesity caused by calorie hoarding in the human body. Running belongs to aerobic exercise, which can effectively promote the flow of the body’s fat layer and accelerate the rate of fat consumption in the human body. Not eating at night is easy to make the excess calories in the body consumed, so that the fat compensatory oxidative consumption to provide energy for the body, for weight loss has a positive effect. Although running without eating at night can lose weight, but long-term running without eating at night will not only affect the body’s diet, but also make the human intestinal tract discomfort symptoms, resulting in a variety of adverse gastrointestinal diseases, so it is not recommended to always run without eating at night to lose weight. Weight loss should develop a reasonable and healthy way to exercise in order to achieve better weight loss.