I have it pretty bad, been to chiros and deep tissue massage therapists, but
didn't have much luck with it.
This site has some good resources....
http://www.exrx.net/Kinesiology/Posture.htmlIn my case, quads are tight as hell and hamstrings are weak.
Abdominals are weak and need to be trained hard and heavy.
I was told deep, deep leg presses are helpful.....use light enough
weight for slow, controlled reps and hold at the bottom.
Lunges help too, but everyone thinks they're gay.
I paid a strength trainer to put together a list of exercises for postural issues;
he consulted with physical therapists, ART practitioners, and other strength
coaches and basically consolidated it for me.
If you want to PM me I can send you some files on stretches and various
exercises that help fix imbalances.