Sarno's work comes up periodically on HN, and I always have to chime in to say that it cured my RSI. Everything is still completely, 100% cured at 15+ years. As a developer, I have no idea what I would have done without it, my career would have been over. Here are my previous comments:
From 2016: https://news.ycombinator.com/item?id=12990976
From 2021: https://news.ycombinator.com/item?id=26120633