Hi judybug, to answer your question about aching legs, that was my biggest complaint. Had to leave work due to the fact I could not sit, stand, and especially walk for more then a few minutes. Now my hamstring is pulling really bad. I was diagnosed with spondyliolisthesis last year with a full blown disc at L3-4. The back pain is not as bad as the leg pain and it took quite a while to believe this was from my back. But other people on this board has stated and my surgeon, that is one of the symptoms. I had an MRI done and it showed the nerves being compressed at that level. Maybe it's time for another MRI for you to see what is happening. If you had back problems before, it probably is stemming for your back. Good Luck, Linda