Fascia is a thin tissue that covers all of the body’s muscles. This is a very fibrous and strong connective tissue that envelopes and isolates the muscles of the body, providing structural support and protection. Fascia looks like the white tissue found on the outside of fajita meat in the grocery store.
When the fascia is well hydrated it is very elastic, however when a muscle tightens up (like in a long car ride) it can wring the water out of the fascia. The fascia then shrink wraps around the muscle creating tension and pulling on the joints. Myofascial release is a type of manual therapy which involves stretching and massage of the fascia to release the 'shrink wrap' and free the fascia.