A friend once said “There’s all these studies about how bad sitting is for you. Now there are even studies about how bad standing desks are for you. Nobody ever says anything bad about laying down so I just try to do that as much as possible.” I still laugh. Perhaps true in part though.
IME it's not sitting or standing or lying down that's injurious, it's not moving . My pain to a large extent went away when I stopped staying so still. Now I change my posture on the regular, from leaning against the backrest to sitting away from it to taking little breaks to pace around a bit. Similarly, I used to get eye strain from all the screen time. Until I moved to an office with a view and I found myself star…
The sitting posture matters because the spine is kept erect naturally, like a vertical pendulum. Once you get used to it, it is a pretty relaxed posture that feels quite sustainable .. compared to sitting in any chair.