They were often fatter then in the off season. Arnold's nickname was "smooth". He had very little definition in the off season (especially when Weider first got a'hold of him) and many pictures have him looking much smaller than when he was preparing for a contest as far as muscle mass. Because of media access today, there are more pictures of today's bodybuilder's available. New media access doesn't mean we can go back in time and take more pictures of past bodybuilders. There weren't many pics at all of them in the off season.