McQuaid said that Armstrong’s teams had a “win at all costs” attitude fueled by “deceit, intimidation, coercion and evasion,” and that all of the evidence was there to prove that Armstrong doped. He added that he was sorry the cycling union had not caught Armstrong and his teammates “red handed” so he could have thrown them out of the sport.

Armstrong, who has vehemently denied ever doping, declined to comment Monday. But in the past, he said that he, his teammates and those riders who competed against him would always know he won those seven Tours. By early Tuesday, his biography on his Twitter page had been changed to no longer say he is the seven-time Tour de France winner.

The antidoping agency applauded the cycling union’s acceptance of the penalties the agency gave Armstrong in August, when Armstrong gave up fighting his case. Back then, the cycling union was battling to gain jurisdiction over the matter.

“Today, the U.C.I. made the right decision in the Lance Armstrong case,” Travis Tygart, the antidoping agency’s chief executive, said in a statement. “Despite its prior opposition to Usada’s investigation into doping on the U.S. Postal Service cycling team and within the sport, Usada is glad that the U.C.I. finally reversed course in this case and has made the credible decision available to it.”