Weighted ION Massage Ball Hula Hoop, For Effective Intense Abdominal Workouts and Quick Fat Burn - For Experienced Hoopers, Diameter 43in / Big-ball Massage Hoop for step 2 Maximizes weight loss and improves workout results. CAUTION *The hoop may be painful at first. But once you get used to it, it will help you get rid of those muffin tops by targeting your core muscles. * Burn Up to 400 calories or more per hour! Great for adults who want to lose and tone their abdominal area New ground-breaking fitness device that targets the core muscles while improving posture and circulation Simple assembly: connect the bodies and easy to take apart for quick storage; great for travel.