"Steroids only work if you're training hard and without breaking any regulations." In golf, the chance of being caught is essentially non-existent. No professional tour, nor the USGA, has specific wording in its regulations barring performance-enhancing chemicals. However, all players are required to submit to blood and urine tests at any time during the season, and may be disqualified for violations found during these examinations. In fact, there have been no reports of any major tennis or golfers being banned for using performance-enhancing drugs. But because of the risk involved, most professionals avoid them whenever possible. The main type of drug used by sportspeople is anabolic steroid. These can increase muscle mass and strength, but they can also cause serious side effects such as hair loss, enlargement of the heart ventricles, and increased risk of cancer. Anabolic steroids were first developed in the 1950s and have since become popular among athletes who use them to enhance their performance. Although they were originally designed to be used by bodybuilders, some people have used them to improve their golf swing or tennis serve. A number of high-profile athletes have been caught using anabolic steroids, including baseball player Barry Bonds and football players Marion Jones and Lyle Moevao. All major sports have rules against using performance-enhancing drugs, and golf is no exception.