PiYo - Define: Lower Body - Who says you have to jump, grunt, strain, and punish your body to get amazing results from your workout? Not with PiYo…PiYo combines the muscle-sculpting, core-firming benefits of Pilates with the strength and flexibility advantages of yoga. And, we crank up the speed to deliver a true fat-burning, low-impact workout that leaves your body looking long, lean, and incredibly defined.