Doping in sport
Endurance sports

The use of performance-enhancing drugs in sport has become an increasing problem across a wide range of sports. It is defined as any substance or drug that, when taken, gives an athlete an unfair advantage relative to a "clean" athlete. The banning of these drugs promotes a level playing field and equality among athletes. The use of 'the suit' in swimming, which gives athletes an advantage in the way of hydrodynamics, has been banned from international competition due to the unfair advantage it delivered. The drugs taken by athletes differ widely based on the performance needs of the sport.

Erythropoietin (EPO) is largely taken by endurance athletes who seek a higher level of red blood cells, which leads to more oxygenated blood, and a higher VO2 max. An athlete's VO2 max is highly correlated with success within endurance sports such as swimming, long-distance running, cycling, rowing, and cross-country skiing. EPO has recently become prevalent amongst endurance athletes due to its potency and low degree of detectability when compared to other methods of doping such as blood transfusion. While EPO is believed to have been widely used by athletes in the 1990s, there was not a way to directly test for the drug until 2002 as there was no specific screening process to test athletes. Athletes at the Olympic Games are tested for EPO through blood and urine tests. Stringent guidelines and regulations can lessen the danger of doping that has existed within some endurance sports.
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