If you take insulin or oral diabetes medicine, you may have low blood glucose levels during and after exercise. In fact, you may get low blood glucose 12 or more hours after a workout. People who have type 2 diabetes that is controlled by meal planning and exercise usually don't have problems with low blood glucose.
Glucose fuels your muscles during exercise. At the same time, exercise helps pep up insulin's action. Both things lower your blood glucose level. Through careful planning, you and your health care team will learn to adjust your insulin treatment to avoid low blood glucose levels caused by exercise.