Information Floyd Landis recently gave to the United States Anti-Doping Agency about how cyclists have and still are getting around the biological passport analysis system could have an immediate impact on the sport, according to at least two people with direct knowledge of the system.
Michael Ashenden, a Australian exercise physiologist and blood doping researcher who sits on the nine-man independent panel that reviews biological passport data for UCI (cycling's international governing body), and Dr. Don Catlin, an anti-doping researcher who pioneered methods for steroid detection, both told ESPN.com that Landis' information could be crucial in understanding how cyclists try to beat the system.
All that may sound like science fiction, but according to Ashenden, Landis has probably provided a key piece of the puzzle that has vexed him and his peers for a long time: Why some riders' blood values remained within a unusually narrow range, a pattern that was suspicious in and of itself but not generally subject to sanctions.
"We've known they're doing something, especially in the last year," Ashenden said. "It's still brazen beyond belief." He believes a small intravenous dose of EPO would remain detectable in a urine sample for at least six hours, even if an athlete is diluting his blood.
Ashenden recently completed a study in which he injected subjects intravenously twice weekly with microdoses of EPO over a period of three months, then ran their blood values through the biological passport software. "Not one of them failed," he said.
Catlin said Landis' account matches anecdotal accounts he has heard through the years, "although I've never had it described as vividly," he said.