It has been suggested that because the back is the route of the Sun Meridian and the Du Meridian, and Shu points of zang-fu organs are also distributed on the back, it often hurts the back, which has good fitness and therapeutic effects. Because it is simple and easy to do, you can exercise regularly anytime and anywhere. An old doctor suggested that it is appropriate to keep 1000 times a day at least for your own convenience.