Muscle Energy Technique (MET) is a technique where the therapist will stretch a specific muscle and ask the client to contract against this stretch but at a very low effort.   Your therapist will most likely use this technique once they have used other massage techniques to reduce tension in the body first.  The most important part of the technique for the client is not to contract the muscle with too much force.  Ideally, approximately 20% effort is all that is needed, and this is then held for anywhere between 5-20 seconds. The goal of this technique is to relax the tight muscle, increase range of motion in a joint that may be restricted due to this tension, and sometimes to reduce the fibrosis within tissues that may have been caused by injury.