(warning, anecdotal) I have been behind a computer full time (>= 8 hrs/day) (usually including weekend) for over 30 years now, I take breaks for exercise, cooki

(warning, anecdotal) I have been behind a computer full time (>= 8 hrs/day) (usually including weekend) for over 30 years now, I take breaks for exercise, cooking & parties and have done for most of that 30 years. I have found, for myself anyway, that RSI has zippo to do with the amount of typing, mousing or work I do. I have done years of 12 hr days full on typing and I have gotten beginning RSI symptoms from a few weeks of stressful meetings with very little typing in between. As I was young then and did not want to waste time not being able to lift my arms or move my wrists, I experimented and found that, again for me, it's just 100% stress. Any exercise (none, too little or too much), working 20 hours or 2 hours are completely unrelated for the onset; if there is a stress factor (like; our new product is not selling!! back then) I would get symptoms immediately and they would get worse once started when typing/mousing more if the stress factor stayed constant. After that and other health events triggered by (much heavier) stresses, I got my brain to not stress (took me a lot of years) and that worked. I can just work forever behind a computer (which I usually don't need anymore, as I found also that it's completely useless to work many hours / day) without any effects for the past 13-something years.