Blood, sweat and gears ? the race against erythropoietin use in cycling

摘要

IN JANUARY, US cyclist Lance Armstrong ended a decade of persistent allegations and vehement denial by admitting that he used performance-enhancing drugs to power him to seven consecutive Tour de France victories. But one question remained. Just how did Armstrong beat the testers for so long? How can he have not turned up a single positive test in his 11-year career?