The International Cycling Union ratified the United States Anti-Doping Agency's sanctions against the American on Monday, effectively destroying Armstrong's last hope of clearing his name after he was exposed as a drug cheat.
To his 3.38 million followers on the social networking site, Armstrong now simply states he is: "Raising my 5 kids. Fighting Cancer. Swim, bike, run and golf whenever I can."
The now retired Armstrong, 41, had elected not to contest the USADA charges in August.
Landis, who was stripped of his 2006 Tour title for doping, admitted in 2010 to using performance-enhancing drugs and said his former team leader at US Postal, Armstrong, also cheated.
- Sports & Recreation
- International Cycling Union