This question might be hard to understand, but how come there seem to be many different kinds of six packs? Is it due to methods of training or is how an individuals abdominal muscles will look predetermined by genetics?
If you look at the attached files, pictures 1 and 2 - these two guys have six packs, but they look kind of thin and lumpy and not that great.
On the other hand:
Six pack on guy in picture 3 looks full,and they are square, not thin lumpy rectangles.
another example would be like brad pitt in fight club.
how should you train to get the lean, full six pack look?
no homo, i know this thread is awkward
Thread: different types of six packs