Undersun Fitness founder and resistance band training expert James Grage  showcases some signature biceps-building exercises with dumbbells—and equivalent moves to do with resistance bands. These exercises are guaranteed to make your muscles pop whether you’re training in the gym, your basement, or on the road.

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How James Grage Recovered From a 150 MPH Car Crash

We sit down with the fitness industry leader about his near-death experience.

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