Huh. That makes sense.

The chair I spend most of my life in these days has no back support whatsoever. There used to be a backrest, but it fell off. Now, there's just an awkward metal thing jutting upwards into my ribs, as this angle is somehow more comfortable than others.

My back hurts, constantly. It has for months. And, what's funny is, it only just now occurred to me that there might be a connection.