In 1987, when I was making Rambo III, I used to take an amino acid that's nearly as strong as steroids. It's about 15 times more powerful than the typical amino acid, but give none of the raw rage - the anger - that comes with steroids. All steroids do is make you a cumbersome, apelike goon.
When Stallone first came to Franco to begin training, he was 170 pounds and very well defined. But he didn't feel he was big enough and wanted to put on 10 pounds of muscle in six weeks. Franco knew how hard Stallone was capable of training, so he decided that was a feasible goal.
"Sylvester gained just about 10 pounds in six and a half weeks," Franco says. "He has great structure, with a waist only about 29 inches. When we started, he had a 44-inch chest. At the end, his chest was almost 50 inches. And his arms went from 16 ½ inches to 18 inches. He was bigger, harder and much more muscular. Wait until you see him in the movie. He's going to shock a lot of people by how good he looks."