Sure, you can run or walk off fat. But bouncing it off is just so much more fun. With the rebounder–a fancy name for a mini trampoline–you can jump, jog, and just have a good time while torching up to 1,000 calories per hour. Other boosts to bouncing: It can speed up your metabolism, cleanse your body of icky toxins by stimulating the lymphatic system, and give you more energy to boot. Plus, it’s low-impact, so you don’t have to worry about doing damage to your joints.