On a lot of chairs, the lumbar curve is usually not in the right place (it's usually too low for me). On my chair at work (which I really like, BTW), there is an adjustment on the back to raise or lower the support that creates the lumbar curve on the back of the chair. The other thing to keep in mind is that of you have not had good posture for some time while seated, a chair that promotes good posture might not feel right and may even make you a little sore for awhile until you body adjusts. Be sure, though, that you are sitting with the correct posture, and the new chair is not promoting bad posture.