Some bodybuilders use anabolic steroids and other performance-enhancing drugs to build muscles and recover from injuries more quickly, but competitions sometimes ban using them because of the health risks or considerations regarding fair competition. Despite some calls for testing for steroids, the leading bodybuilding federation (National Physique Committee) does not. The winner of the annual IFBB Mr. Olympia contest is generally recognized as the world's top male professional bodybuilder. Since 1950, the NABBA Universe Championships have been considered the top amateur bodybuilding contests, with notable winners such as Reg Park, Lee Priest, Steve Reeves, and Arnold Schwarzenegger. Winners generally go on to become professional athletes.