After lying down, there are more benefits of turning the legs upside down, and the most easily overlooked benefit of this posture is the ability to reduce the stress on the joints. Most of the body weight is concentrated in the upper part of the body, so that the hip, knee and ankle joints are subjected to a great deal of pressure role. The knee joint, in particular, is a very important joint in the body. Knee joint pathology or injury, lying down upside down can significantly reduce the pressure and burden on the knee joint, thus making the knee joint healthier, so that the knee joint disease recovery more quickly. This posture also has the role of promoting blood circulation in the lower extremities, so that the lower extremity microcirculation accelerated, promote the recovery of vascular elasticity, prevention of lower extremity vascular thrombosis, vascular sclerosis and local plaque, so that the human leg more healthy.