Good Morning America - Are Roller Derby Workouts the New 2013 Trend?

If your new year's resolution is like so many others, to get in shape, and you're tired of the same old workout. I feel like I'm about to do an infomercial. It's time to exercise your need for speed on roller skates.

It's roller derby-inspired workouts. Cameron mathison got on skates to show us how to help you lose weight and gain confidence. Really?

Oh, my goodness. Confidence? Whoo!

Reporter: It's the original all-girls full-contact sport, high-speed and hard core. Skaters like janice chop lynn, gori spelling and skeev jobs whipping around a track at lightning speed. You don't need name like suzy snake eyes to join the party.

For people bore at the gym, this might be the ultimate full-body workout. Derby-inspired classes popping up all over the country. Cardio, squats, core straining of real roller derby without the body slamming.

And the women say, it's addictive. It's the only exercise I have ever been excited about. Reporter: At derby light, women of all ages suit up and they're seeing results.

I lost 80 pounds. Reporter: Not as brutal as the original sport, it still looks dangerous to me. Some new girls come in and say, am I going to get hurt?

I say, 100%. Reporter: But they keep coming back? You don't feel the pain.

Here at the l. A. Derby kols, she offers a fitness program for girns like me.

You're moving fast, it's exciting. Your endor for instaphins are going. It's like fitness is a byproduct.

Reporter: It's intim dagt. If I can do this, seriously. What they're doing looks hard.

My teacher, lace and arsenic, shows me this. I don't have name yet. You have is to stay low.

Reporter: What if I really stuck with the knee slide. It's on to the banked track. No, no, no.

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