Patients with a fasting blood glucose of 9.9 mmol/L can lower their blood glucose through exercise, but not necessarily to normal levels. The normal range of fasting blood glucose is 3.9~6.1mmol/L, more than 7.0mmol/L can be one of the diagnostic conditions of diabetes. Therefore, a high fasting blood sugar of 9.9mmol/L may indicate diabetes, and it is recommended to further combine with clinical symptoms such as excessive drinking, excessive eating, excessive urination, weight loss, etc., as well as postprandial 2-hour glucose to make a definitive diagnosis. Patients diagnosed with diabetes can lower their blood glucose through exercise. Exercise is an important means of managing diabetes, especially for type 2 diabetes patients with obesity, exercise can increase the body’s sensitivity to insulin, and can also help to reduce weight; it is recommended to perform 150 minutes of aerobic exercise per week, such as jogging, jumping rope, etc. In addition, dietary modifications such as diet and exercise are also recommended. In addition, attention should be paid to dietary modifications such as low-sugar and low-fat diets, and medications such as metformin and acarbose. Abnormal fasting blood glucose is recommended to go to the hospital, under the guidance of the doctor for treatment.