im a little older than the author. I also play a musical instrument that I guess you would say is physically demanding, and I have a hobby that is sort of hard on the hands. On the forums I inevitably follow about those activities, there is a sort of background of paranoia about how if you don't do everything perfectly all the time, your hands will be ruined, you will never have seen it coming, and you should base all your decision-making regarding practice time around avoiding catastrophic injury.<p>I'm sure there are some other people who share my interests who have been the victims of misfortune when it comes to RSI injuries, but I think for the bulk of us who do anything repetitive, it's not incredibly difficult to avoid these issues if you just pay attention to what you feel.<p>For example, on Friday I noticed that, after pretty much a solid week of intense editing of code (I wrote a large thing and then realized I had gotten it all wrong and needed to move a lot of stuff into different files), I kept noticing that my elbows were killing me because they were grinding into the armrests of my chair. It didn't dawn on me until the end of the week that the reason I don't usually have that elbow discomfort is that years ago I took the armrests off my chair, or as the case with my current chair, I folded them backward and out of the way. I had put them down to clean them or something and forgot about it.<p>If I mind myself, I'll notice the stuff that makes me uncomfortable. If I try doing whatever that is less and I feel better, then I've learned something. If I stop doing the thing that I've learned makes me uncomfortable, that's great. If I did it too long and I need to visit a doctor or a therapist to help me undo the damage, that's great too.<p>So long story short, pay attention to how you feel, recognize that however you feel is probably a result of the choices you've made, intentionally or not, and treat your body as a machine that needs maintenance and either find a good technician or learn to do it yourself when it makes sense.