I am fused from T-11 to L5. My upper back around the shoulder blades is not fused so I still have flexibility there. As far as the lumbar area, I do not feel very stiff. I can bend at the hip, but just cannot curl or round my back, as if I were to do a sit up. I used to do lots of pilates before the surgery so it's a little frustrating that I cannot round my back anymore, but there's quite a lot that I can still do. I honestly don't feel like I lost all that much mobility. I had lots of pain before my surgery and now am mostly pain free, though there are days where I've done too much lifting and bending (I have a baby) and I get a little achy.
Good luck with whatever you decide to do!
Surgery date: April 20, 2004
Fused T-11 to L-5
Pre op lumbar curve: 70 degrees, thoracic curve: 42 degrees
Post op lumbar curve: 19 degrees, thoracic curve: 18
Surgeon: Dr. Boachie-Adjei
Had successful pregnancy and birth 2 years post-op