Lance Armstrong: Doping in sports

Published On: Jul 13 2011 12:23:19 PM PDT   Updated On: Jan 17 2013 10:42:10 PM PST

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.