Activity immediately after a meal may affect 2-hour postprandial blood glucose. In addition to affecting blood glucose, exercising immediately after a meal may interfere with the digestion and absorption of food, may cause abdominal pain and discomfort, and is generally not recommended immediately after a meal. Two-hour postprandial blood glucose is one of the common indicators used to assess blood glucose levels and is usually measured in a quiet state. Exercise immediately after a meal promotes the uptake and utilization of glucose from the blood by peripheral tissues and usually lowers the 2-hour postprandial blood glucose level. In the case of diabetic patients, exercising immediately after a meal may result in lower blood glucose levels and hypoglycemia; in addition, exercising immediately after a meal may affect digestion and cause gastrointestinal dysfunction, which is not conducive to good health. If abnormal blood glucose levels are found, they should be diagnosed and treated under the guidance of a professional doctor to avoid delays.