anything i say will get overruled by the masses of uninformed.
has your condition been prevalent since childhood or fairly recent?
there is more to it than exercises, its a matter of retraining your body's proprioception (awareness) for posture. regaining tone in the muscles that straighten you out and relaxing the ones that bend you up. reason i mentioned before to minimize training (which got shot down...) the tight muscles is that it tends to exacerbate the condition. most people dont see the big picture, yes you can work them provided you are training the muscle's antagonist so it isnt lengthened and inhibited further. ask someone who has tight hip flexors to squeeze their glutes, its not easy for them. watch someone with tight hip flexors squat, chances are there is minimal glute involvement and they dont stand all the way up. it just illustrates my point about how particular muscles that are tight need to be possibly left alone until you retrain the ones that have been "sleeping" to participate. lordosis can be structural, but many times its referred to as an anterior pelvic tilt or lower cross syndrome. which usually occurs from weakened deep stabilizers, inhibited glutes (due to tight hip flexors), tight spinal erectors and lengthened abdominals and hamstrings. note the tightened muscles and their inhibited lengthened muscles.
hope that helps a bit. pm me or post on here, if you have any specific questions.
im now ready for the gym science to ensue. bring on the misconceptions!