Lance Armstrong steps down at Livestrong: What will his legacy be? One week after the U.S. Anti-Doping Agency released more than 1,000 pages of evidence supporting allegations that Lance Armstrong helped lead a massive doping program, the embattled American cyclist's personal brand continues to nose-dive. As Liz Clarke reports: In his first acknowledgment that his personal brand has been damaged by the U.S. Anti-Doping Agency's voluminous account of what it characterized as "serial cheating" throughout his cycling career, Lance Armstrong resigned as chairman of the Livestrong Foundation he created to help cancer patients, he announced Wednesday. On Wednesday, Lance Armstrong said he is stepping down as chairman of his Livestrong cancer-fighting charity so the group can focus on its mission instead of its founder's problems. More on Lance Armstrong The complete USADA document, which includes background, discussion of evidence, scientific evidence and conclusions. Rick Maese The U.S. anti-doping agency has moved to strip him of his titles, but the long-term impact of the decision on his legacy and foundation remains unclear. Sally Jenkins USADA has banned cyclist Lance Armstrong for life, stripped him of his Tour de France titles after he dropped his fight against doping charges. On August 23, 2012 Lance Armstrong released a statement that he will stop fighting allegations that he used banned substances during his stellar career. Those associations will continue, at least for now. Nike's decision to drop one of the brand's most prominent athletes was a result of "significant evidence" that Armstrong used performance-enchancing substances and hid those truths from the company. As Cindy Boren writes: The Oregon-based company announced the termination of its long relationship with Armstrong shortly after he announced that he was resigning as head of his Livestrong cancer charity. Nike, in a statement on its website, said: Due to the seemingly insurmountable evidence that Lance Armstrong participated in doping and misled Nike for more than a decade, it is with great sadness that we have terminated our contract with him. Nike does not condone the use of illegal performance enhancing drugs in any manner. Nike plans to continue support of the Livestrong initiatives created to unite, inspire and empower people affected by cancer. Armstrong resigned as chairman of Livestrong a week after a U.S. Anti-Doping Agency report called the former champion cyclist the driving force behind "the most sophisticated, professionalized and successful doping program that sport has ever seen."