T his book seeks to provide a comprehensive orientation to the fundamental concepts and clinical applications of Muscle Energy Technique (MET) as they have evolved over more than forty years. Fred L. Mitchell, Sr., DO, FAAO, the original developer of Muscle Energy Technique, never wrote a book, or even a paper, about MET specifically. Mitchell, Sr. did, however, write two highly significant papers! (1948, 1958) about manipulative treatment of mechanical dysfunctions of the pelvic joints. He gave credit to . Ruddy, . (1874-1964) and Carl Kettler, . as primary sources for his developing Muscle Energy concepts