A primary form of cheating that has occurred in professional cycling is found in the use of performance-enhancing drugs, including anabolic steroids. Anabolic steroids encompass an entire family of drugs related to testosterone, the male hormone, and which stimulate muscle growth in the body. Anabolic steroids may be taken by pill, injection or administered through the skin.
American rider Floyd Landis, who won the 2006 Tour de France, was stripped of his championship a month after the race when the results of a drug test showed higher-than-allowable levels of testosterone as well as the presence of synthetic testosterone in his body.
