I'm tall, 6'4'' to be exact, even though I lie on on-line dating services and say 6'3'', cause that seem to be the "normal" cutoff.
I sometimes get back pain from sitting at my computer for long periods of time. One way to help this is to not sit at my computer too much. But I'm Irish, and we're a stubborn people. (I feel like ever ethnicity is considered a stubborn people.)
What have I done to help alleviate pain? I've lowered my seat alllll the way down. I'm so low that the table reaches about 4 inches below my nipple. My arms rest comfortably on the table and I think I sit straighter because of this. Screw developing back muscles.