Bodybuilding is the process of developing muscle fibres through the combination of weight training, increased caloric intake, and rest. Someone who engages in this activity is referred to as a bodybuilder. As a sport, called competitive bodybuilding, bodybuilders display their physiques to a panel of judges, who assign points based on their aesthetic appearance.

Certainly the most famous bodybuilder in the world is Austrian Arnold Schwarzenegger, Governor of California, whose Hollywood acting career was launched after his success in bodybuilding. His acting career was boosted by his appearance in the bodybuilding documentary film Pumping Iron after winning the 1975 Mr. Olympia title. This film also helped another bodybuilder, the hearing-impaired Lou Ferrigno, to get the part of The Incredible Hulk in the 1980s TV series.