In other words, you must fall deeply asleep before sleep yields substantial, recuperative benefits. These are factors that some believe contribute to a higher incidence of RSI in women. Your neck should be comfortably supporting your head, your spine should be in a natural S-curve, your arms touching the keyboard and mouse without reaching out, wrists unbent, and fingers relaxed. It's conceivable that you might work at the most uncomfortable workstation imaginable, and survive unscathed until your other predisposing factors put you in the danger zone. But the voluminous experience of individuals once they have RSI bears out the difference between good ergonomics and bad.
Many sufferers can distinguish the difference between straight wrists and bent, some within moments.
It only makes sense to assume that these stressful positions are accumulating trauma in the pre-symptomatic typist. We'll describe ergonomics extensively, in our section on therapy. But there are other causes of the various RSI symptoms, and we don't want to entirely discount these. In some cases, the shape or relative sizes of your bones could predispose you to injury by repetitive motion. Other factors implicated in RSI are as diverse as hypothyroidism, use of oral contraceptives, arthritis, and improperly set bones.