You can control your blood sugar by eating foods low in carbohydrates, sugar and fats. You have to exercise. When you do moderate exercise, like walking, that makes your heart beat a little faster and breathe a little harder. Your muscles use more glucose, the sugar in your blood stream. Over time, this can lower your blood sugar levels. It also makes the insulin in your body work better. And monitor your blood sugar level regularly to prevent hyperglycemia and hypoglycemia.