Amateur and professional bodybuilders prepare for the 1975 Mr. Olympia and Mr. Universe contests as five-time champion Arnold Schwarzenegger defends his Mr. Olympia title against Serge Nubret and the shy young Lou Ferrigno.
Arnold Schwarzenegger
Self
Lou Ferrigno
Mike Katz
Serge Nubret
Franco Columbu
Ed Corney
Ken Waller
Robbie Robinson
