Interesting, this is exactly what my psychotherapist recommended. I have not tried it yet, partly because I am tight on money right now and this is not cheap, partly because I was not entirely convinced it would be worth it - more convinced now.

However, I did find a physiotherapist to help me with chronic back issues and noticed that my mental state improves significantly after what they call "mobilisation techniques", which are manipulations that also release tensions in the body. I always knew about the body-mind connection but I guess I underestimated the effect.