Lance Armstrong, who this fall was stripped of his seven Tour de France titles for doping and barred for life from competing in all Olympic sports, has told associates and anti-doping officials that he is considering publicly admitting that he used banned performance-enhancing drugs and blood transfusions during his cycling career, according to several people with direct knowledge of the situation. He would do this, the people said, because he wants to persuade anti-doping officials to restore his eligibility so he can resume his athletic career.

For more than a decade, Armstrong has vehemently denied doping, even after anti-doping officials laid out their case against him in October in hundreds of pages of eyewitness testimony from teammates, email correspondence, financial records and laboratory analyses.

When asked if Armstrong might admit to doping, Tim Herman, Armstrong's longtime lawyer, said, "Lance has to speak for himself on that."

Armstrong has been under pressure from various fronts to confess. Wealthy supporters of Livestrong, the charity he founded after surviving testicular cancer, have been trying to persuade him to come forward so he could clear his conscience and save the organization from further damage, one person with knowledge of the situation said.

Several legal cases stand in the way of a confession, the people familiar with the situation said. Among the obstacles is a federal whistle-blower case in which Armstrong and several officials from his U.S. Postal Service cycling team are accused of defrauding the government by allowing doping on the squad when the team's contract with the Postal Service clearly stated that any doping would constitute default of their agreement.

Herman said the option to confess to anti-doping officials was not on the table. However, the people familiar with the situation said Armstrong, 41, was in fact moving toward confessing and had even been in discussions with the U.S. Anti-Doping Agency. Armstrong had met with Travis Tygart, the agency's chief executive, in an effort to mitigate the lifetime ban he received for playing a lead role in doping on his Tour-winning teams, according to one person briefed on the situation.

Armstrong was also seeking to meet with David Howman, director general of the World Anti-Doping Agency, that person said. Herman denied that Armstrong was talking to Tygart and said he was not looking to speak with Howman, either.

Armstrong hopes to compete in triathlons and running events, but those competitions are often sanctioned by organizations that adhere to the World Anti-Doping Code under which Armstrong received his lifetime ban.

According to the World Anti-Doping Code, an athlete might be eligible for a reduced punishment if he fully confesses and describes how he doped, who helped him dope and how he got away with it. But a reduced lifetime ban might decrease only to eight years or four, at best, anti-doping experts said.

The timeline for Armstrong's deciding whether to confess is unclear, but it is partly based on whether the U.S. Justice Department will join the whistle-blower lawsuit, which was filed under the False Claims Act. The sole plaintiff of that lawsuit is Floyd Landis, Armstrong's former Postal Service teammate who was stripped of the 2006 Tour de France title for doping.

Armstrong is also facing two other lawsuits, but what worries Armstrong and his lawyers most, two of the people with knowledge of the situation said, is that he could face charges of perjury if he confesses because in sworn testimony in the SCA case he said he had never doped.

Before coming forward, Armstrong would need assurances from the Justice Department that he would not be prosecuted, those two people said.