I am skeptical on whether Arnold was clean when he first started training. I mean he worked out with Austrian pro-bodybuilders when he first started, they must have given him something. In any case, with or without steroids, Arnold has some of the greatest genetics in the world. Check out 'Arnold: Encyclopedia of a Bodybuilder', you can get it used on Amazon.com. I got it this summer, and its a very good, interesting read about his bodybuilding career.