I found that exercise is very important when you have a back injury or back pain. I tried to walk around the pond near my house and back up my street up a steep hill to my house, which is approximately 1 mile. I also joined a local gym which has also helped a lot. I put up a new page at HURT911® showing some of the gym equipment that I use for my back. My favorite is the Cybex torso rotation machine.
I find that if I do not go for a walk for a couple of days or do not use the Cybex torso rotation machine for several days, my back starts to bother me again. You can see the Cybex torso rotation machine and the other equipment I use at
http://www.hurt911.org/therapeutic/gym_equipment.html