The McKenzie Method of Mechanical Diagnosis and Therapy (MDT) provides the clinician with a comprehensive diagnostic and therapeutic concept. Self treatment is the keystone of the system, but clinician techniques are used to complement patient forces if necessary. The website www.mckenzieinstitute.org supports the participants of MDT courses worldwide and gives them access to videos of all procedures appropriate to their level of MDT education. It is a highly professional tool for daily practice, and will assist with preparation for the credentialling exam. extension mobilization 엎드려 누운 자세에서 허리 젖히기를 반복적으로 실시하면 통증이 줄어 들지 않고 오히려 통증이 증가할 경우 신전모빌라이제이션을 적용.