Known in western as Tao Yoga, Tao Yin is the ancestral ‘technique’ used in Qui gong and Tai chi and also some other martial arts to direct the energy. It seems that science is not able to understand it http://www.youtube.com/watch?v=0Z1Rm4ANFl8
It seems reasonable to believe that can improve in a significant way the body tissues as they says. I have read that provide a correct (and forgotten?) use of the tendons and psoas and the way to get a flexible spine and a better posture.