THREE-WAY FAT BURNER

TRAINER Wendy Larkin, personal training manager, Crunch, San Francisco

WHAT YOU’LL NEED A jump rope, group cycling bike, and treadmill

CALORIES BURNED 450–500

“Alternating between different types of exercises allows you to push yourself to your limits—then briefly recover and do it again on the next piece of equipment—while using all your muscles,” says Larkin. “It’s a with both feet, then gradually start alternating feet. If you can’t do 10 minutes, jump for 10 revolutions, then rest for 15 seconds. Add 10 revolutions at a time until you get to 10 minutes. When you’re cycling, begin with just enough resistance to feel a slight pull on the wheel, then increase it from there. During the standing portions, keep your butt over the seat and your legs over the pedals.