The incredible success of comic book movies isn't just changing the landscape of summer blockbusters. It's completely changing what Hollywood expects out of movie stars. Actors of all types are now required to bulk up like never before as movie studios cast more roles seemingly designed for demigods. And as ripped men are continually splashed across movie posters around the world, actors in other, lower-key roles are expected to keep pace in the physique race. An insightful feature story in this month's Men's Journal takes an in-depth look at the crazy industry that helps actors who'll do anything to get superhuman looks.