While sitting or laying at a desk all day, you'd have to try very very hard to get a bed sore from doing it, wincing through quite a bit of pain and itching and discomfort to remain seated.

There's a reason the guy in the image is like 90+ years old and either suffers from immobility and/or nerve issues. Anyone more healthy than that would feel the need to squirm and get up long before one would form.

Also, the way we sit in a chair isn't exactly activating any muscles over just laying down or reclining in a La-z-boy. For that reason I do like the idea of sitting on one of those inflatable yoga balls when I'm not standing.

I bet you could burn an extra 200 calories a day just incidentally bouncing as you ponder HN.

Content warning at that Pressure Ulcer click. Its rough and probably NSFW.