Sergey Bakulin
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Sergey Vasilyevich Bakulin is a male race walker from Russia.
Bakulin at the 2011 World championships Athletics in Daegu.
Athlete biological passport
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An athlete biological passport is an individual electronic record for professional athletes, in which profiles of biological markers of doping and results of doping tests are collated over a period of
Sergey Bakulin
…He was advanced to 5th place when teammate Igor Yerokhin was disqualified and banned for life following a second finding of irregularities in his biological passport, an indicator of performance-enhancing drugs. Bakulin began serving a previously unannounced suspension for irregularities in his biological passport…
Ricardo Serrano was one of the five first riders that UCI opened a biological passport case against, in 2009.