Charles Gaines, whose book Pumping Iron helped to popularize bodybuilding, dies at 84

1974 book led to making of seminal documentary and introduced Arnold Schwarzenegger to the worldCharles Gaines, the author whose book and documentary Pumping Iron helped bring professional bodybuilding into the mainstream and introduce Arnold Schwarzenegger to the world, has died. He was 84.Gaines died Tuesday, according to Greta Gaines, the author’s daughter. She did not reveal a cause.