Research follows South African runner Caster Semenya being banned from competing by the IAAF without taking medication to lower her testosterone levels.
Anti-doping has become an arbitrary process, so why not change the rules?
Top Olympic star says court ruling is a political attempt to "bury athletics."
The world's greatest sprinter says WADA is doing all it can to ensure clean sport.
The country has failed to satisfy the World Anti-Doping Agency's demands.
The confectionary giant is in the middle of a five-year deal as sponsor of the Kids' Athletics program.
Sir Craig Reedie speaks to Newsweek in the second part of an exclusive interview.
Sir Craig Reedie speaks to Newsweek on the difficulties of restoring faith in sport.
The world No. 2 says the scale of the alleged match-fixing offenses has surprised him.
The letter shows that the governing body knew of the scale of the crisis as far back as 2009.
Mara Yamauchi, Britain's second fastest female marathon runner, says the organization may be beyond repair.
IAAF President Sebastian Coe also severs ties with Nike
Former Olympian is also an ambassador for Nike
The athletics' governing body says it followed up on all suspicious blood tests.
"Never have I seen such an alarmingly abnormal set of blood values."