Bodybuilding is a subjectively judged sport based on muscular development and body presentation. Males and females participate in contests at the amateur and professional levels. Training and nutrition must be well-matched and will vary depending on the demands of the training period—maintaining muscle mass, building muscle mass, tapering (precontest dieting), or cutting weight immediately before competition. Learn more about the sport at the International Federation of Bodybuilding and Fitness website (www .if b.com).