> they all had in common was how "stiff" their typing posture was, and the strength at which they hit the keys. Yeah! Its what I want to be researched. I play

> they all had in common was how "stiff" their typing posture was, and the strength at which they hit the keys. Yeah! Its what I want to be researched. I play piano and guitar, and to do it successfully I had spent a lot of time learning to not apply more force than needed. Somtimes it needs to change a posture. I learned piano being a kid under a supervision of a teacher, so probably I don't remember the most of my learning troubles. But I learned guitar at my late teens and I remember clearly how I was corrected by a teacher, then corrected again and again. I oftentimes needed a break because of pain in muscles. And I wonder might it be that in the most cases RSI is the consequences of the wrong posture or too much force applied. If it so, I suppose, switching layouts would help because of breaking a muscle memory and learning it anew, not because the new layout is better. The very RSI could influence learning: pain is a good teacher, it forces student to seek for painless ways to do things.