Lance Armstrong: Doping in sports

Posted: 3:23 PM EDT Jul 13, 2011   Updated: 1:42 AM EST Jan 18, 2013

Lance Armstrong confessed to doping to win the Tour de France during an interview with Oprah Winfrey on Thursday. In sports, doping refers to the use of performance-enhancing drugs and substances taken to mask performance-enhancing drugs in test. Particual types of drugs are banned by sports organizations. Click to find out more.

 
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