Armstrong revealed his decision in an interview with The Associated Press on Wednesday in Austin, Texas. He insisted he had no regrets about his decision to return to the sport in late 2008, in spite of his failure to win an 8th Tour de France and the allegations of doping in his former US Postal Service team that surfaced in 2010, bikerradar.com
“I can’t say I have any regrets. It’s been an excellent ride. I really thought I was going to win another Tour,” Armstrong told AP. “Then I lined up like everybody else and wound up third.
“I have no regrets about last year, either. The crashes, the problems with the bike - those were things that were beyond my control.”
Armstrong has been accused of using performance enhancing drugs
while competing in professional cycling tours, the latest of which is the allegations made by former US Postal Service team mate Floyd Landis, though he admitted he doesn't have any proof or documentation to support his claim.
Armstrong is a known cancer survivor and was diagnosed with stage three testicular cancer at the age of 25. His cancer has already spread to his brain lungs and abdomen after undergoing rigid diagnosis. Armstrong was spitting blood when he consulted his urologist and had to undergo surgery and chemotherapy to save his life.
After the operation his doctor said he had 40% chance of survival. Two years later, Armstrong seems to have recovered from his illness and was back in major tournaments.
In 2005 Armstrong announced his retirement from professional cycling after his seven consecutive Tour de France wins.
Three years later Armstrong announced he would return to cycling for a cause.
"After talking with my children, my family and my closest friends, I have decided to return to professional cycling in order to raise awareness of the global cancer burden", Armstrong said
Last Wednesday Armstrong announced he is retiring for good.