In my own experience, wrist pains didn't actually come from wrist action, but from wrist action with my arm in an unnaturally high position: on a high desk, wit

In my own experience, wrist pains didn't actually come from wrist action, but from wrist action with my arm in an unnaturally high position: on a high desk, with your shoulder kind of "locked", you bend your wrist to reach for the arrows. At the right height, you'd instead move your elbow backwards and not bend your wrist. Also, people often point out that vim-controls are wrist-friendlier than emacs-controls. I use vim more often than emacs, but when in emacs, I user viper-mode to have vim key-bindings.