Difficulty: Moderately Challenging
Step1
Ask your doctor is there is any reason that you shouldn't run. Submit to any tests she requires.
Step2
Plan an hour walking route around your neighborhood. If you don't think you can walk an hour, start with half. Walk this route 3 times a week.
Step3
If you have a dog, you can take him with you on the walk. This helps you pet to stay in shape, too.
Step4
When the hour-long walk no longer strains you, start running. Start by running for five minutes, and then walking. After a week, run for as long as you can go, and than walk.
Step5
Don't worry if you have trouble breathing and you can't run far. You are increasing your lung capacity every time you run. Eventually you'll be able to run longer distances and your breathing will be fine.
Step6
After 2 months, you should be running the entire route, or close to it. Again this depends on your fitness level. Just make sure to do this 3 times a week and you'll be running in no time.