Leaning back helps to alleviate the stress on what remains of my L5/S1 disc. If I can't lean back, then I like you, have to lean on my arms for support.

ABC news article (I'm not allowed to post links yet)
"It turns out sitting up stick-straight is bad for the back, researchers say.

Your back is best off in a reclining position, which takes pressure off the spinal disks in the lower back, compared to the upright posture that most people consider normal, according to new research presented today at the annual meeting of the Radiological Society of North America."

I was in a severe car wreck at age 17 and am now 43. I've had issues with sitting up straight ever since then. If I tried to drive over an hour, my back would always lock up...turn hot...and when I exited the car I would have to walk a few steps to even stand up straight. In hindsight, I guess that is when the L5/S1 issues really began.

I appreciate your help and am thankful to anyone who will listen and try to provide support.