Wiggins' bio passport numbers released

Numbers back up rider's assertion that he's clean

by Dave Atkinson   July 31, 2009  

Bradley Wiggins on the Ventoux, TdF 2009 (Photosport Intl)

As promised, Bradley Wiggins has made public his bilogical passport data from the last year. The data covers the period from 26 February 2008 to the end of the Tour, and Wiggins tweeted earlier today that he's "in the process of getting together all tests taken from 2003-2008"

The data covers two indicators: the quantity of haemoglobin in the blood which is linked to the hematocrit level, which the UCI caps at 50% for pro riders; and Wiggin's 'off score' number which is a variable which takes into account both haemoglobin level and the number of reticulocytes (immature red blood cells) in the blood. This second indicator is much used as a reference point for assessing a rider's blood profile. We'll not pretend to understand exactly why this is, but instead defer to the Wikipedia page on blood doping, which helpfully tells us,

"If a high number of mature red blood cells (RBCs) is not accompanied by a high number of immature RBCs (reticulocytes) it suggests that the mature RBCs were artificially introduced by transfusion. EPO use can also lead to a similar RBC profile because a preponderance of mature RBCs tends to suppress the formation of reticulocytes"

The upper limit for the off score is 134 (the blue line). Wiggins gets nowhere near that limit, topping out at about 100 and trailing off to just below 85 by the end of the Tour. A normal score is in the 85-95 range, which is where Wiggins' curve spends nearly all of its time. That the numbers fall towards the end of the two major Tours is also a good sign, as that's what would naturally be the case during a tough race.

Garmin-Slipstream have long been regarded as the Pro team with the staunchest anti-doping stance, and the team are fully behind Wiggins' decision to publish. “Brad is an exceptionally talented athlete and it was great to see him do so well in the Tour de France. He’s always been an outspoken advocate of clean cycling. He requested that we release his results after the Tour and his decision makes me and the entire team proud,” said Jonathan Vaughters, CEO of Slipstream Sports.

wiggins-blood-profile.pdf130.54 KB

4 user comments

Oldest firstNewest firstBest rated

Contador next please...for the last 5+ years

not all carbon is the same.

Jon Burrage's picture

posted by Jon Burrage [1081 posts]
31st July 2009 - 14:54


Yeah, can't imagine that any of the three higher placed riders will publish theirs.

posted by pjt201 [101 posts]
31st July 2009 - 15:15


If the other front page news that Alberto may join Garmin is true they should ask for the data before signing any contract.

Blackhound's picture

posted by Blackhound [459 posts]
31st July 2009 - 22:39


I dont see why garmin would want him personally, they have a genuine GC contendor in bradley so get people in to support him not alberto who would want the team rebuilt around himself.

not all carbon is the same.

Jon Burrage's picture

posted by Jon Burrage [1081 posts]
1st August 2009 - 9:33