It is scientifially proven that doing cardio intervals sheds fat! Walk for one minute, then sprint for 30 seconds. Do this for 15-30 minutes 3 days/week and you're sure to lose weight! Be sure to ease in to it however. Don't jump right in and over do it... you'll risk overuse injuries, other musculoskeletal injuries, and getting discouraged. If needed, meet with a personal trainer who can analys your current condition and give you the right duration and intensity to shoot for!