Hoop to It
Hula hooping may sound silly, but it's a serious abdominal workout. "Hooping rivals runningit burns 600 calories an hourbut it's a lot more fun," says Gabriella Redding, CEO of Hoopnotica. "It engages your upper and lower abdominals and your obliques, perfect for getting into a bikini." Try it an hour a day, three times a week, for the best results.