No gym? No problem! [Video: Total-body workout to do anywhere]

All you really need to get super-fit is your own body; it provides enough resistance to sculpt a lean, sexy physique. The secret? Engage as many muscles as possible while quickly moving from one exercise to the next to keep your heart rate high. In this body-weight circuit created by Raphael Verela, owner of the Circuit Works studios in Venice and Brentwood, California, you'll do a resistance exercise followed immediately by a high-energy cardio move that works the same muscle group.

"We call it the zigzag method," he says. "It effectively increases lean muscle mass and decreases body fat by engaging more muscle fibers and burning tons of calories in a short amount of time."

These no-gym-required fat burners--paired in supersets (two moves done back-to-back without resting in between)--will get you into killer condition fast.

Cardio vs. Weight Training: Is One Better Than the Other?

What to expect Start with the first move and do as many reps as you can in 60 seconds. Then go immediately into the second move, again performing as many reps as you can do in 60 seconds. Continue until you've finished all eight moves. That's one circuit. Rest for a minute or two (or challenge yourself by taking a shorter break), then repeat for a total of two or three circuits. You will do this routine on three nonconsecutive days per week.

Watch the video below for pointers on doing the exercises with correct form, and/or. . .

Download a Printable Version of this Workout

Killer Core Exercises for Women

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