Shake Off Your Booty

Hold on tight while trying the latest fitness craze: group classes on the Power Plate, a device with a vibrating platform. You'll tense and release you muscles 30 to 50 times per second to balance on the plate as the instructors lead you through strength-training moves like lunges and squats, as well as stretches.

More than 30 private studios and fitness centers across the nation - including select Bally Total Fitness locations - are offering total body training classes on the unit; a typical session lasts 25 minutes.

To find a health club where you can try it, go to http://us.powerplate.com/EN/contactus/plate_locator.aspx.