Cycling doping is a good thing to look into, there has been a major crackdown on drugs in that sport and a lot of the little guys who got caught have been quite open in their interviews of what they were up to and how they avoided testing positive.. Doping was so rife in cycling, a sport with small financial gain, and it seemed fairly easy for guys to cheat independently I would be amazed if there was not a lot of drug cheats in the major leagues of sports where drug testing is lax and the money is huge. Why not cheat :S