that bulge is their inside guts pushing out from the HGH. yes some have naturally larger abs which stick out, but when u see a pro that looks fuckin pregnant, that's excessive HGH usage. pro bodybuilders nowadays can't compare to how they looked in arnold's day up to the days of flex, ray and levrone...it all took a turn for the worse when yates, although he was badass, took it over the edge and blew up over 300 and presented a new freak benchmark around 1992, 1993.