I came across a great post on diethack.com (a general health related blog) that lists 19 tips to staying healthy while you work at a computer….
right there at number 3
"Discard Qwerty and Azerty: Although I can touch type on both Qwerty and Azerty keyboards, I’m thinking of doing an overhaul and actually going back to a type of keyboard which is not well-known, the Dvorak keyboard. Here is a piece of history. Qwerty was actually developed in 1860s for typewriters. Notice if you are using a Qwerty keyboard that most of the time when you are writing a word, you go from one side of the keyboard to another. That was to avoid typewriters from becoming jammed by slowing the typists and making them type from two extremes. The advantage that Dvorak has over a normal Qwerty keyboard is that it is far more efficient if you have mastered it properly and most important of all, it poses less strain on your hands unlike Qwerty."
here is a link to the full post
