Professional bodybuilding involves the use of anabolic steroids to build muscle mass. There are two types of steroids - anabolic steroids, which promote muscle growth, and catabolic steroids, which break down muscle. While anabolic steroids can help with muscle building, weight loss, and athletic performance, they also carry health risks like heart and liver problems. The International Federation of Bodybuilders was founded in 1946 and established competitions like Mr. Olympia to find the best bodybuilders. Many famous champions like Arnold Schwarzenegger, Lee Haney, and Ronnie Coleman are believed to have used steroids to achieve their championship physiques, though drug testing policies have challenges.