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.

Why is this downvoted? It’s accurate - healthy, mobile-able individuals don’t get pressure ulcers. You’ll shift your weight and move around enough to avoid any damage.

It’s folks who are bedridden and don’t have the ability to move themselves around that get pressure ulcers. Combine that with poor circulation and potential nerve damage (diabetes) and it’s not hard to do.

A health 35 year old? You’d have to force yourself to get a pressure ulcer.

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