Lance Armstrong: Doping in sports

Published On: Jul 13 2011 03:23:19 PM EDT   Updated On: Jan 18 2013 10:40:26 AM EST

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.