I had surgery on January 17th 2011, one level PLIF fusion at L5-S1 with titanium cage, rods and screws. My original pain is gone and I am able to work out and walk with no pain, but I can't stand for more than 15-20 minutes without extreme pain. I get extremely stiff and I feel like there is a brick in my back. As soon as I go sit down, the pain goes away. Could this be from the hardware or scar tissue? I have not been back to my doctor since my 3 month post-op. He said only come back if I am having problems. I do plan to make an appointment to go back and see him. Has anyone else experienced this?