@allisonl My experience has been that getting results from physical therapy for thoracic outlet syndrome takes a long time. There are multiple layers of tight tissue and fascia that need to be addressed and that is a slow process, but progressively you get to deeper layers. The doctor that diagnosed was at a teaching medical center and he told me it would probably take 3 years of physical therapy to rehab TOS. I was able to tell that the MFR work was helping immediately. but it's something that you need to keep working on and you can do a lot at home after the PT shows you what to do. Mayo is a good place for TOS diagnosis. There is surgery for TOS, but it can make it worse because of surgical scar tissue that compounds the problems of tight fascia, and MFR is used to treat surgical scar tissue. My PT can tell by looking at me where my body ids too tight or twisted out of shape and she begins there. We have also done some strengthening to try to hold better body mechanics and function after releasing tight tissues. When the scalene muscles are tight, they pull the rib cage up, and it doesn't relax and let the ribs relax and it holds the chest taught. MFR is like kneading bread dough where you sink in and push to create a shear and you hold it against the barrier. It will start sliding and you follow it or change direction as it changes. There is a provider finder and a lot of information in the MFR discussion. What I notice is my chest wall moves better after I've had physical therapy.