Smoking also replaces oxygen, needed by your muscles, with carbon monoxide. Both obesity and extreme slenderness are associated with higher risk for injury. Women are more susceptible to RSI than men. This may be due, in part, to the higher proportion of women doing repetitive tasks. Women, however, have smaller muscles with which to do the heavy keyboard work.
Pregnant women are particularly at risk for carpal tunnel syndrome.
I wear elbow length, fingerless, wool gloves to keep my wrists toasty warm. At last, we turn to ergonomics. It is imperative to realize that repetitive work is the culprit, not your workstation. Without redesigning your work and health habits, you remain at risk. Even the best ergonomic furniture in the world won't prevent injury if you don't know you use it.