I don't personally have experience with this so I have no advice to offer, but I have noticed that is often comes up in a Pilates discussion board that I frequent, particularly when they are on the topic of proper spinal curvature/pelvic tilt/neutral/flat -- there are many words that come into the discussion that everyone is always trying to refine what they mean.

Pilates might be a direction for you to explore, but I think it's probably important for you to define the problem and define your goals. Then do LOTS of research and decide on a course of action.