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Exercise, Diabetes, and Weight Loss continued...

Physical activity burns both blood sugar and sugar stored in muscle and the liver. If you use insulin or other diabetes medicines, you should closely watch your blood sugar levels when you start exercising. Over time, as you exercise regularly and work with your doctor, you may be able to lower doses of medications and insulin.

Each type of exercise affects blood sugar differently.

Aerobic exercise -- running or a treadmill workout -- can lower your blood sugar immediately.

Weightlifting or working out hard for a long time may affect your blood sugar level many hours later. This can be a problem, especially if you're driving a car after your workout. It's one of the many reasons that you should check your blood sugar before driving. It's also a good idea to carry snacks such as fruit, crackers, juice, and soda in the car.