I'm having a 2 level fusion & fixation w/ instrumentation (PLIF) on L4-S1 on 11/4/11 and had a post-op question. Once my fusion takes hold in 6-12 months, what kind of differences will i notice in my posture and range of movement when I bend over and such? Will I feel a significant difference in the way my body bends and moves? Is it obvious and quite a different feeling to what I was used to before the fusion? If anyone that has had this same L4-S1 procedure done, please let me know what I can expect.Also, what happens in someone who has had multiple fusions on multiple levels? How much of a difference is their range of motion? Thanks in advance.