hey, i'm a noob when it comes to lifting and/or bodybuilding. i'm in pretty good shape thanks to soccer and basic weight lifting but i'm curious about one thing. i have tried crunches and my upper abs are pretty defined, but i can't seem to get the lower abs to get defined. i was wondering what sort of exercises i could possibly do to basically get a full on six pack. i apologize if i'm being too vague, and would appreciate any help.