Prolonged cycling may not be good for diabetes, and it is recommended that people with diabetes ride appropriately. Exercise is one of the daily treatment of diabetes, diabetes through medication to lower blood glucose, and then with diet and exercise to control blood glucose stability. Appropriate cycling exercise for diabetic patients can improve glucose metabolism, increase the sensitivity of peripheral tissues to insulin, increase energy consumption, thus achieving the role of auxiliary hypoglycemia. However, prolonged riding may have a certain burden on diabetic patients, prolonged riding body is too fatigue, consume too much energy, but will cause blood sugar fluctuations. Therefore, diabetic patients should grasp the time when riding, each riding time can be controlled in about 30 minutes. In addition to focusing on exercise, diabetic patients also need to go to the hospital on a regular basis to review and understand the changes in blood glucose data.