Lessons of the Hip & Spine from Dr. Shirley Sahrmann

That is repeated movements and prolonged postures that cause movement disorders by causing what she refers to as directional susceptibility to movement (DSM) and relative flexibility. This is an extension of basic physics: movement will follow the path of least resistance. In an ideal body, that path will move in a manner that maintains optimal positioning of joints and involvement of appropriate muscles so that it does not cause wear. In a body that has been changed through repeated movement or prolonged postures, the path of least resistance can lead to suboptimal movement.