This is not about my back, but it\'s still a painting related injurie:
I used to sit in a very strange position when painting. This included sitting with my legs crossed for hours which had the result that my foot fell asleep. Now I didn\'t really care about that until the phone in the other room rang and I had to get up and answer it. only problem was my sleeping foot...instead of walking
with it I walked
on it, it sort of twisted around so I actually walked on the top of my left foot!
I had to jump around on one leg for a couple of days after that (which gave me another excuse for just sitting around painting all day

).
Nowadays I sit much more upright in my chair...or at least I try to.