High blood glucose after 2 hours of postprandial exercise has both physiological and pathological causes, which need to be analyzed specifically, and generally the blood glucose can be returned to normal through rest, dietary management and medication. 1. Physiological factors: With the increase of exercise load, in order to meet the demand of energy metabolism, glucagon and glucocorticoid will increase, which will lead to the increase of blood glucose. At this time, blood sugar may return to normal after rest. 2. Pathological factors: commonly found in diabetic patients with unstable blood glucose control and high blood glucose before exercise, at this time, patients should test themselves whether there are dietary problems, such as overeating or not regularly taking hypoglycemic drugs, etc. If there are no such factors, they should go to the hospital and adjust the glucose-lowering program under the guidance of the doctor. Exercise after high blood sugar, need to analyze their own specific circumstances, to exclude physiological factors in a timely manner after medical treatment, if the diabetic population, exercise should be tested before blood glucose, and at the same time to follow the principle of gradual and orderly progress, can not be strenuous exercise.