Let's face it. Aerobics are boring. In trying to put a fresh face on the tedium of hopping around for hours on end, fitness gurus have come up with everything from steps and slides to Richard Simmons and "Sweatin' to the Oldies." But we've never seen anything that was quite as goofy (and fun) as the newest cardiovascular craze: the Fitball
Developed in Switzerland in the '70s as a therapeutic exercise tool, the Fitball looks like a thick-skinned beach ball. Sizes vary according to the user's height, from a diameter of 17 inches (for smaller users) up to 29 inches.