Funny - I'm reading McGills Low Back Disorders at the moment and he covers this subject. He calls it "crossed pelvis syndrom" - it is basicly that your glutes are not working correctly and the hamstrings and spinal erectors are doing all the work because of that. There are several artciles available on this - try a Google search or get McGills book from the library and read it. There are thing you can do to correct this. I have the same issue and will be working on it as well.
ye thats right. its basically from sitting down too much and your hip flexors get too tight, and the glutes shut off. from the research ive done it seems that the best things you can do for APT is
-Strengthen glutes and hamstrings.
-Strengthen transverse abdominis (planks and rollouts are the best options.
and apparently you shouldnt stretch the hamstrings or do quad dominant exercises while trying to fix APT as it can make it worst.
i posted on the bodybuilding website aswell to see what others had to say, and theyve given me some good articles which i think will help.
here they are for anyone whos interested.
it also has these two articles within the articles i listed above.
that pretty much covers everything were gonna need to know. im gonna go and watch some tv then come back and read all four of those links. their not too lengthy which helps.