The double-Olympic medalist's coach dismisses the doubters.
Getting faster isn’t simply a matter of getting high and cranking out the miles.
He was caught in an out-of-competition drug test last month.
She served out a two-year ban from the sport and is now back racing.
She had tested positive for EPO in 2009.
Six years after testing positive for EPO, the former marathon champion finally admits his guilt.
New drug aimed at helping patients with kidney problems could be the latest performance enhancer in athletics. Anti-doping authorities are
Liza Hunter-Galvan will be banned for two years after testing positive for EPO in an out-of-competition test and admitting to taking the