Gergely Zsolnai / Shutterstock Imagine moving like Mayweather , jabbing like Klitschko , even developing a terrifying Tyson -like scowl while at the same time getting ripped like Amir Khan . Sorry, those first three won't happen. However, it’s still possible to improve your fight game —even without the use of any boxing equipment such as gloves, a heavy bag, or the risk of getting knocked out—and burn enough fat to give yourself a world-championship physique . Shadow boxing is a staple for fighters—it’s also a sneaky killer cardio workout . While burning upward of 400 calories per hour, shadow boxing also helps you develop foot speed , hand-eye coordination, and technique. And best of all, it can be done anywhere, anytime for a quick and heart-pumping fight session . “Shadow boxing is a great full-body workout with minimal impact,” boxing instructor Cole Williams says. “Every punch is like a pulley system, working your hips, core, and shoulders—just shredding your bo...