Whether blood glucose increases or decreases after exercise cannot be generalized; if it is aerobic exercise, blood glucose may decrease. However, if it is anaerobic exercise, blood glucose may increase, the specific situation is analyzed as follows: 1. Aerobic exercise: During aerobic exercise, the body needs nutrients to supply metabolism, which will consume a lot of physical strength and energy. Therefore, after strenuous exercise, the blood glucose concentration will drop and low blood glucose will occur. 2. Anaerobic exercise: some people’s blood glucose will rise after exercise, mainly because anaerobic exercise leads to an increase in the amount of glucose and oxygen consumed by the body during exercise, which may stimulate the sympathetic nerves and cause the secretion of glucagon, thus causing an increase in blood glucose. Diabetic patients should pay attention to the appropriate amount of exercise to avoid hypoglycemia during exercise, can be under the guidance of the doctor reasonable exercise and standardized treatment.