All gain no pain: Does Hollywood have a steroid problem?

It’s been called the worst-kept secret in Hollywood. How do actors who play superheroes and action hunks get in Zeus-grade shape? How do they get ripped in the space of a few months, and maintain their vascular, zero body-fat physiques over a 90-day shoot? How do they do this well into middle age – fitting in high-intensity workouts twice a day – when the majority of their peers are doing burpees not for cardio but to help their baby grandchildren digest their dinners?