Lance Armstrong, a disgraced former cyclist champion has for the first time admitted using performance-enhancing drugs during all seven of his Tour de France wins. After years of denial, the 41-year-old cyclist made the admission during an interview with the US a chat show Oprah Winfrey. However Armstrong denied it was sport's biggest doping programme, saying it was smart, but it was conservative, risk averse. He told Winfrey, doping was part of the process required to win the Tour and he did not feel he was cheating at the time and viewed it as a level playing field. Armstrong was stripped of his Tour de France titles last year after being labelled a serial cheat by the US Anti-Doping Agency.