It is based on the principle of human spine: the calf drives the thigh, which feels like a hula hoop, swinging easily and relaxing.
I don't know if I feel healthy after eating it. At the same time, exercise the spine and repair the heart, liver, lung, stomach and kidney.
The effect of the integration of five zang-organs Shuang Ankang has been discontinued, and now there is an upgraded version of Shuang Ankang, Haimen Aerobic Swing Machine.
13 export quality assurance, double Ankang movement, remote control version, details can be found in ICBC jung mall, search for "aerobic swing machine"