Superman (Salkind films) adopted a high protein diet. He added of muscle to his thin frame. He later made even higher gains for "Superman III" (1983), though for "" (1987), he decided it would be healthier to focus more on cardiovascular workouts. One of the reasons Reeve could not work out as much for "" was an emergency appendectomy he had in June 1986. Reeve was never a Superman or comic book fan, though he had watched "Adventures of Superman" starring George Reeves. Reeve found the role offered a suitable challenge because it was a dual role. He said, "there must be some
Look, Up in the Sky: The Amazing Story of Superman Look, Up in the Sky: The Amazing Story of Superman Look, Up in the Sky! The Amazing Story of Superman is a 2006 documentary film from executive producers Bryan Singer and Kevin Burns which details the history of the "Superman" franchise, from comic book, to television, to the big screen. The story of Superman is told through archival footage, as well as interviews with many of the actors, directors, and producers involved with the Superman media over the years. The closing credits feature outtakes from the Christopher Reeve "Superman" films, including an outtake of Marlon Brando improvising during the recitation