Generally speaking, exercise causes a transient increase in blood glucose, and it is recommended to measure blood glucose after half an hour of rest. After exercise, the secretion of cortisol hormone, adrenal hormone, noradrenal hormone, dopamine and other hormones in the body increases. The above hormones have the effect of antagonizing insulin and weakening the hypoglycemic effect of insulin, which can increase the blood glucose level of the body. If the blood glucose value is measured immediately after exercise, the measured value is higher than the normal value, which is not conducive to the diagnosis of the disease. It is generally recommended to rest for half an hour and wait for the hormone metabolism in the body before measuring. However, some patients may have hypoglycemia after exercise, at which time the blood glucose value needs to be tested immediately and the patient is instructed to use medication. In addition, general exercise, such as walking and going upstairs, has been performed before measuring blood glucose, which has less influence on the result and patients need not worry about it, but exercise with higher intensity should be avoided.