Gyms push the creative envelope (AP)

Get off that boring old treadmill and belt out a cheesy Elvis song on the exercise bike, instead. Strut around in 3-inch heels or work up a sweat on the pogo stick. As gyms compete with dance studios and adult sports leagues to hold on to members with ever-shorter attention spans, run-of-the-mill aerobics and other classes are getting an injection of creativity. So, sessions like "Karaoke Spin," "Pogo Bootcamp," and "Stiletto Strength," are springing up in gyms across the country. "People are putting ...