Rock out with Crunch's new class.

You already whip your hair back and forth. Now, it's time to whip yourself into totally ripped shape.

Get a rock star bod with Crunch's new POUND - Rockout. Workout. Created by drummers and former bandmates Kirsten Potenza and Cristina Peerenboom, this high-energy mix of cardio intervals, Pilates and drumming can burn up to 800 calories during a 45-minute class. (Watch a video demo here.)

The routine uses neon-colored "Ripstix," aka weighted drumsticks that work the upper body, back, core and lower body, so you can get toned while playing along to a great soundtrack. We had a blast drumming on our exercise mats and following the beat. The next day, our obliques and legs were achy in a great way.

Watch the exclusive workout here. (Use a set of regular drumsticks or wooden spoons if you can't find Ripstix.)

POUND launches at Crunch gyms this week. Try it at a location near you.  

It's the jam.

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