Muscle Energy Technique (MET) is a technique that was developed in 1948 by Fred Mitchell, Sr, D.O. It is a form of manual therapy that uses a muscle’s own energy in the form of gentle isometric contractions to relax and lengthen the muscle. As compared to static stretching which is a passive technique in which the therapist does all the work, MET is an active technique in which the patient is also an active participant.