A short history of Olympic cheating
Finding a way to win can tempt an athlete to test the boundaries of fair play, as the difference between fortune and failure is measured in fractions of a second.
Whether it’s a deliberate shot in the arm or an innocent cold pill, bending or breaking the rules of competition has been around as long as sport itself.
In some instances, like freestyle skiing or curling, where pure skill far outweighs lung power, cheating isn’t considered a big factor.
However in endurance sports like speed skating, cross-country skiing and biathlon, there’s a worrying history of skullduggery through drug use — a trend that has given rise to squads of medical experts collecting blood samples and statistical analysis of spikes in the oxygen content of red blood cells.
read more http://www.cbc.ca/olympics/story/2010/02/11/spo-olympics-cheating.html