PT and trying to get fit in general has made a big difference in my pain levels. I think it very much depends on what issue you're having. I have a lot of joint/tendon/ligament issues, so strengthening the muscles around them helps to support them. If there was a different problem pt could make it worse. If the pt thinks it's a good idea I'd go for it. They don't usually recommend it if they think it will make things worse.
I have also had less pain as I work in t. I'm not sure how that correlates though honestly because being in t helped me get out of the house and start exercising and stuff. So it had a direct effect in that regard, but as far as somatic memories and stuff idk. I'm never quite sure which are which anyway. I've also never worked specifically on reducing somatic memories, it was other trauma processing work we did.
That probably was not very helpful. Sorry. :hug