The History of the Development of Muscle Energy Concepts The development and refinement of what is now known as Muscle Energy Technique has been a process in evolution over the past fifty years. Muscle Energy Technique (MET), which originated with Fred L. Mitchell, Sr., continues to develop and evolve, first in the hands and minds of those who were privileged to study and learn the method directly from Fred Sr. (the 'second generation'), and now, as the third and fourth generation of students of the method apply it in their practices. In the late 1940s while I was still in high school, Fred Mitchell and Paul.
