Core Workout for Six-Pack Abs

15-Minute Workout: Abs, No Weighting

Burn fat and build muscle without lifting a weight

Build Muscle with Bands

Most men are wary of any exercise equipment not forged in iron, and that's too bad—especially when it comes to resistance bands, says David Jack, general manager of Competitive Athlete Training Zone in Acton, Massachusetts.

Related: Big Muscle in 15 Minutes

Here's why: Unlike weights, resistance bands create constant tension throughout a lifting movement, recruiting more muscle fibers and accelerating growth. "They're portable, cost about 20 bucks, and double as a great stretching partner," Jack says. "Plus, you can do around 200 exercises with them." Here are four to help you start. (To try an entire exercise routine designed around a medicine ball, try The Tar Heels Workout. It’s the same cutting edge plan that whips the University of North Carolina basketball players into shape.)

Search: Find resistance bands for sale

DO THIS Anchor one end of a resistance band at waist height to a squat rack, porch beam, or other sturdy structure. Do all four exercises as a circuit, with limited rest between them. Once you've completed them all, rest for 1 minute. Do three circuits. (Video: At-Home Resistance Band Workout)

For even more 15-minute workouts, see The Men's Health Big Book of 15-Minute Workouts.

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