Then there is the Chinese team whose flunked the drug test more than any countries combined since 1990. The trend is dangerous. Today human growth hormone is undetectable with testing. Genetically, engineered athlete is on the horizon, according to professor of exercise science at Old Dominion University Mel Williams, as genetic technology is advancing. However, it is important to note that athletes can enhance their performance greatly with nutritional, psychological, biomechanical, and even pharmacological aids and still be within rules.
Anabolic steroids are probably the best known drugs of abuse in sports.
Classically, anabolic steroids are taken by power athletes, widely used and abused by body builders and recreational weight trainers, and they are also reputedly used as a training aid by endurance athletes to improve recovery from training loads. Steroids work by modifying chemical sutures to increase the anabolic effect and reduce the androgenic effect. More than 100 different anabolic steroids are available, taken wither by mouth or by injection. Because these drugs are used mainly as training aids athletes may stop some weeks before an event and later pass the competition dope test. Clearly, if athletes knew their own clearance time for a particular oral or injectable drug they could plan drug use to give maximum benefit with least risk of detection.