Maybe a twist to the question. Since I "learned" to play piano as a child untaught, I had poor habits, which I've put a fair dent into by now. But I also had iffy body use otherwise as well. I relearned movement in everyday tasks, or caught what I was doing in everyday tasks and did them differently, applying some principles I was learning on the music front, and that fed back to piano. In other words, was it kneading the dough, or how you were kneading the dough?
Back in the time that I was learning the violin, one day I played a recorder piece. I played it over and over, trying to get it right. Then practised violin. I ended up with carpal tunnel - bags or cups dropping out of my hand. That healed with rest. Later when I started learning some general principles, I found I was also doing bad things on the recorder (also self-taught). Probably a tight grip over the air holes, esp. the thumb. Instead of bringing the recorder to my head in comfortable posture, I bent my head to the recorder, and arms were not in a relaxed position. So the full story of the carpal tunnel via recorder, compromising violin, had to do with how I was using my body, and pushing through without resting while having tension.
