I've been told so by some back professionals. I don't think it's that one form of sitting is better than another, everything else being equal. It's more about t

I've been told so by some back professionals. I don't think it's that one form of sitting is better than another, everything else being equal. It's more about the neck alignment to the direction of your hips, which couches are notoriously bad about. It probably makes the difference that you have a swing arm, and aren't looking at a machine on your knees.