Trauma Releasing Exercises (TRE)

TRE stands for Tension and Trauma Releasing Exercises. They help individuals release stress or tension as a result of difficult life circumstances, immediate or prolonged stressful situations, or traumatic life experiences. TRE consists of six simple exercises that help individuals release tension from the muscles, which in turn relaxes the anxiety of our minds, by evoking a muscular shaking process in the body.

The exercises elicit this shaking in a controlled and sustained manner. When evoked in this way, this shaking begins to release deep chronic muscular tension held within the body. They come from the center of gravity of the body (S3), which is protected by the psoas muscles. When shaking is evoked at this powerful center of the body, it reverberates throughout the entire body, traveling along the spine, releasing deep chronic tension from the sacrum to the cranium. When tension is released anywhere in the body, the brain registers a reduction in pain signals and produces new hormones for relaxation and comfort. Often, this release of tension is much like receiving an internal massage. 
Source: http://www.bercelifoundation.org/s/1340/aff_2_interior.aspx?sid=1340&gid=1&pgid=327