Sprinting is one of the most powerful exercises to boost your metabolism. I am so sad I haven't trained track and field when I was little. Here is a daily training on the stadium by your choice.
Do one 100 meter sprint will low speed just to prepare your joints. Then do 5 series of 100 meter sprints followed by 100 meter walking back slowly and breathing all the time ( taking all the time you need, just don't do 20m/1 min ). After that jog until your muscles are relaxed and go home.
This simple plan will boost your metabolism and will keep your body burning those calories you take. Personally after this I feel my ribs hurt from the fast and deep breathing while you run. And don't be surprised if your whole body hurts after this ~30 min workout.
If you are going to exercise your way to weight loss, don't forget to take all the supplements you can get your hands on. Protein, Natural antioxidants, Green tea, Caffeine, Omega fats and other specially prepared for this occasion products. They can only HELP you in your reaching your goal.