Comment by earthicus

I recently started learning the piano as an adult, and from what i've gathered from reading and watching videos, the 'folk wisdom' about how to avoid rsi-type injuries is to minimize tension in your wrist by maximizing relaxation of your fingers and wrists (especially the thumbs, which tend to get locked into a permanent state of mild tension on the piano keyboard). So you want to do your best to develop more finger independence, so that you can press with one finger while keeping the neighboring fingers relaxed. It's really hard.