WEEKLY WORKOUT: Erin and Sonya sweat it out with a kickboxing class

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Fifteen years ago, kickboxing classes were a novelty. Today, you'll find them at almost every health club. But you probably won't find a martial arts expert teaching them.

"I've been involved in martial arts for 33 years," says Greg Ferry.

At first glance, his kickboxing class looks like any other fitness class.

There's loud music, yelling and sweating.

"We do so many different things in the class," says Greg. "It's over before you know it."

It's only 45 minutes and it is fun! There are lots of kicking, punches and elbow combinations. But it's far from easy.

There are plenty of jabs, uppercuts, jumping jacks and kicks. It's tough, but Greg says anyone can do it.

"You don't have to learn dance choreography for this class," says Greg. "It's easy to learnÂ… I show different modifications. You can kick high or low."

Greg isn't just an instructor, he's also an entertainer. In the midst of the kicking and punching, he gives us his best John Travolta imitation. But ultimately, people keep coming back because it's a great way to get fit.

"It's a total body workout - lower, upper and abs at the end." says Greg. "The top benefit of this class, it takes your mind off that it's a workout."