[justapcgamer]

I think its just genetics, some people are more inclined to experience RSI due to structure of wrists. I'm 22 and I started experiencing wrist pain during college and found that split keyboards are the solution for me to be able to do my work without pain.

[toyg]

Shoulders too. The wider the shoulders, the more awkward your posture becomes on fixed keyboards. Also length of legs, length of spine, etc etc.