MDT is a physical therapy treatment technique that involves repetitive motion of a restricted joint in order to regain pain free mobility.  Robin McKenzie a physiotherapist, founded MDT in the 1950’s.   He observed that a patient’s back pain resolved after resting prone in an extended position.  He then devised a system of repetitive and sustained postures in “preferred directions” the direction of motion that eliminated pain in back, neck and peripheral joints. He founded the McKenzie Institute. The McKenzie Institutes support and document research in the McKenzie method, and organize courses so that physical therapists can become certified McKenzie practitioners. MDT is valuable because it teaches patients to treat their own injuries, because it often resolves spinal and peripheral joint pains in just a few sessions, and because it’s techniques are supported by reliable research. More information is available at McKenzie Institute USA