Take "Swing", one of the basic movements of belly dancing, as an example, the abdominal jitter of this movement is quite severe. I can imagine what it would be like if dozens of mobile phones were vibrating at the same time. Under this strong vibration, both the fat and the fat around the waist or buttocks will disappear without a trace. The originally prominent abdomen unconsciously becomes flat and elastic, and the abdominal muscles will become stronger and stronger.