Blood sugar is even higher after exercise after meals, which may be due to blood sugar measurement immediately after exercise after meals, blood sugar measurement coinciding with the peak of postprandial blood sugar, and poor diabetic blood sugar control. 1. Blood glucose measurement immediately after exercise: after a large amount of exercise after a meal, it will lead to an increase in the secretion of glucagon in the body, including glucocorticoid hormones, adrenocorticotropic hormone and so on, so that the blood glucose appears to increase rapidly in a short period of time. 2. Measurement of blood glucose coincides with the peak of postprandial blood glucose: it is possible that the measurement of blood glucose after exercise coincides with the peak of postprandial blood glucose, when the measured value is higher than that before exercise. 3. Poor glycemic control in diabetes: Diabetic patients themselves have poor glycemic control. If you do not pay attention to diet and medication control, so that the blood glucose does not meet the standard or control is not stable, the blood glucose measurement value will be affected. If abnormal blood glucose occurs, it is recommended to go to the hospital in time for treatment under the guidance of the doctor.