MM, I don't know how to separate out correlation from causation in this context. I am perfectly happy to change my question to: has anyone experienced a correlation between internal training and weird pain in the body? I am not trying to suggest that internal training is bad for you - on the contrary, its effects have been beneficial for me. Just trying to figure out what level/type of pain is acceptable or normal when rewiring the body in this way.
I hear ya -- my point was merely that the "as a consequence of" may have kept some people silent. Hopefully you'll get more responses now that you've clarified.