It’s not about the bike

Another post scrapped from the drafts folder…

Floyd Landis has been stripped of his 2006 Tour De France win after testing positive testosterone. Firstly the ‘A sample’ had an unusually high ratio of testosterone to epitestosterone (11:1 where the permitted ratio is 4:1) . Further testing with mass spectrometery showed that the testosterone to be of synthetic origin, due to a difference in the carbon isotope ratio.

He retains the status of champion and the yellow Jersey pending the findings of the enquiry of the United States anti-doping agency acting on behalf of the USA cycling and the international cycling union.

Controversy over use of drugs started before the race when favourites Ivan Basso and Jan Ullrich withdrew after the Operación Puerto doping case.

Bayesian statistics
Berry, Don, “Inferences about testosterone use among athletes”, Chance, 2004.