With beaches, bikinis, and bare arms beckoning, getting in shape is starting to feel like a sprint to the finish line. Bottom line: there's no quick way to make the pounds melt away, but this formula from Barry's Bootcamp  can definitely help to speed up the process. "The key to burning fat is interval training on the treadmill," says Alycia Stevenin, trainer at Barry's Bootcamp NYC. "If you bring the heart rate up and down for short periods of time, that will put you in your optimal fat-burning zone."
Instead of fussing with complicated treadmill workouts, Alycia keeps it simple with this easy interval routine: 30 seconds of walking followed by 30 seconds of all-out sprinting, then repeat. While you can choose to keep this up for a full 30 minutes, Alycia recommends maximizing your body's calorie-burning potential by adding strength training to your workout. Using her simple interval routine, perform four minutes on the treadmill, followed by one minute of a basic strength-training move  — think push-ups, squats, or lunges. Repeat this six to eight times, and you'll swear that you can feel your metabolism surging!