The weighted hula hoop has a soft gravity ball. The inertia of the gravity ball drives the four-wheel metal axle to slide along the track during movement., Smart hula hoop is simple to use. Compared with the traditional hula hoop, the hula hoop will not fall, which solves the problem that beginners cannot use. You can play videos/listen to music/do other activities while using hula hoop., It is especially useful for postpartum waist training, after sitting in the office for a long time, and when your physical fitness level is low., When the hula hoop rotates quickly, the 360-degree spring damping pressure will massage your muscles deeply to help you burn fat quickly and eliminate fatigue.,