Lance Armstrong admits doping may have caused his testicular cancer as disgraced Tour de France winner confesses he was a drug cheat from the age of 21... NINETEEN YEARS before he was caught and banned.
When asked what age he was when he first began doping, he replies after a long pause for thought: 'Probably 21'.
Armstrong turned 22 just one month after being crowned the road race world champion so it seems likely that he was cheating before the first major win of his career.