Armstrong delivered a speech at the World Cancer Congress, largely steering clear of the doping controversy surrounding him and instead focusing on his experience as a cancer survivor and the work of his charitable foundation.
It was his first speaking engagement since the U.S. Anti-Doping Agency said it would strip him of his seven Tour de France victory medals.
Last week, Armstrong announced he would no longer challenge the USADA's charges against him.
Armstrong is losing all of his cycling titles since 1998, including seven Tour de France wins. He has also been banned for life from competitve cycling.
That did not stop him from introducing himself as a cancer survivor — he was diagnosed with testicular cancer in 1996 — and a Tour de France champion at the cancer conference.
Journalists at the event were asked to steer clear of questions regarding the doping allegations. Armstrong has maintained his innocence and stayed focused on his experience as a cancer survivor and his foundation's work.
In the evening, after he sent out an invitation on Twitter, scores of people joined Armstrong for a fast-paced, hour-long training run up and down Mount Royal. He later tweeted, "Salut Montreal - Merci/Thanks for the run!! I had a blast."
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