For those more inexperienced, it can really hurt after a while to sit like that, and even for those experienced it's probably not recommended to stay in such a

For those more inexperienced, it can really hurt after a while to sit like that, and even for those experienced it's probably not recommended to stay in such a position for a long time. I think all of these solutions miss one of the problems with working at a desk: you're sedentary, and that's ultimately bad for the heart. I can't find a source at the moment, but I read an article here a while ago by the AMA which did an investigation into the effects of sitting/being still. They said that it's better to just move more (and spend a much reduced time sitting) than it is to sit slightly less and engage in intensive exercise. Humans haven't evolved to be spending eight hours a day sitting in roughly the same place with breaks for coffee. Just like lack of exercise, it's poisoning.