Whatever kind of exercise you choose, experts agree that you should start small and work your way up. Start by exercising 10 minutes a day two times a week. After a few weeks, increase your time to 15 or 20 minutes, and increase the number of days. Next, aim to increase the intensity of your workout. If you have been walking, trying walking faster, or take turns between walking and jogging. And try not to forget those muscle strengthening exercises.