Ten Dam questions effectiveness of biological passport after Denifl, Preidler confessions

Laurens ten Dam has called into question the effectiveness of the Athlete Biological Passport after Austrian riders Stefan Denifl and Georg Preidler admitted to blood doping earlier this week. Ten Dam expressed his surprise that the two riders had been able to avoid detection by the biological passport and asked, “is it as leaky as a basket?”

Denifl and Preidler were questioned by the police following a lengthy investigation into German sports doctor Mark Schmidt. Some 40 blood bags were discovered in a garage while five athletes were arrested at the Nordic Ski World Championships, one while infusing blood into his arm before a race. The police investigation is called Operation Aderlass – Operation Blood Letting. 

Cycling first introduced the biological passport in 2008 as a way of monitoring riders’ blood values over time and detecting manipulation and the effects of doping that cannot be spotted by a traditional anti-doping test. However a number of riders have overturned possible bans on appeal, including most recently Burgos BH rider Ibai Salas, reportedly making the authorities cautious about starting legal battles. 


There have been suggestions that riders can use altitude training, illness and travel to justify variations in their Biological Passport levels.  

“I am amazed by the fact that a large blood doping network has to be discovered by the police and the judiciary. And it makes me suspicious. I want answers,” Ten Dam wrote in a column for the Het Nieuwsblad paper.

“Is the blood passport really that bad? Is it as leaky as a basket? Why had Preidler not been caught by the doping authorities and which names are we to expect from that 40 blood-bagged freezer? Many questions, few answers, I fear.”

You can read more at Cyclingnews.com