Why does everyone buy Aeron chairs for programmers?
justlearning: I don't exactly remember, but I do recall reading about posture in office chairs in nytimes, something about the sitting errect was not the right way and the traditionally sloppy way was more easy on the back!
I looked up one link at nytimes - http://www.nytimes.com/2006/12/12/health/12real.html - suggesting that standing erect is the most efficient.