I've been having the opposite reaction. I have pelvic nerve pain, and as you can imagine this destroyed my mountain biking obsession. So far, the best things i've done to get my life (somewhat) back, is to control my fear and outlook on activities i was avoiding. Some of these things i was already doing before i knew about TMS. For instance, i have bladder pain syndrome (IC) and they always tell you "dont eat or drink spicy things". Well, from the very beginning, i didnt think diet mattered with my pain. I'd feel the same whether i drank coffee or water. So because i thought the diet was bullcrap, i never followed it. Therefore, i never got the fear or food avoidance that many bladder pain sufferers get. Then i developed pudendal neuralgia (burning pain in the low pelvis). This can severely restrict the ability to sit. However, the thought of not sitting was unacceptable to me. So, i simply sat as much as i liked. As a result, i never got the severe sitting pain (and fear of sitting). I did get a special cushion, and at first, i was using it everywhere i went. When i learned about TMS, i decided to ditch the cushion. At first my body revolted...then it adjusted. My next plan was to get back into riding. I had spent enough time off the bike and i was miserable and depressed. It made my pain worse!
I started small with the riding. a few miles here and there. At first i'd get so scared i was "damaging" my pelvic nerve. After all, excessive cycling is known to CAUSE this condition. I would be all tense while riding, and then freak out after the ride. Painful flares were often. When i decided to change my outlook and just RIDE and try my hardest to not be afraid, things started changing. Yes i got flares at first, but when i approached my favorite activity with enthusiasm, instead of worry, my mileage drastically increased. I can do up to 30 miles now! I still have some issues with riding very rough trails, or riding multiple days in a row, but I'm working on it. Other people with PN cannot believe i'm willing to risk sitting on a bike seat, but i have proven it to be possible.
My biggest struggle now, is my daily fluctuating pain. i've taught myself to not fear specific active activities, but now i get much more pain at rest.