Spinning the hula hoop is calorie-consuming aerobic exercise,If you want to exercise by Hoola Hoop. Hot Waist Hula Hoop is awont drop hula hoop. Only need to adjust the size according to your waist size until the hula hoop cant drop.you can spin it all the time. AUTO-SPINNING With its centrifugal balls help, you can now do your daily hula hoop goals without exerting a ton of energy and time. A FITNESS BUDDY Helps you keep track of your fitness progress!It has a built-in smart counter that calculates & stores data (which is shown in an LCD screen) of your exercises. EASY TO ASSEMBLE To build this gear, simply lock the parts to each other along with the LCD screen. Then slide the centrifugal ball on the outer side, and fix the support pad on the inner side. No fuss, no sweat!