Sergey Kirdyapkin head coach Viktor Chegin
Biography
Kirdyapkin won the gold medal in the 50 km walk at the 2012 London Olympics with an Olympic record time 3:35:59.
He also won two gold medals in the 50 km walk at the 2005 World Championships in a personal best time of 3:38:08 hours and at the 2009 World Championships, finishing in 3:38:35, his second fastest ever time.He is married to fellow racewalker Anisya Kirdyapkina. He is coached by Viktor Chegin, who also coaches racewalk world champions Valeriy Borchin and Olga Kaniskina.Disqualification
Kirdyapkin's coach, Viktor Chegin, has been embroiled in doping controversy during his whole career and this has passed much suspicion onto Kirdyapkin. Chegin has coached no less than 30 athletes that have failed doping tests. On 20 January 2015 Kirdyapkin was disqualified for 3 years and 2 months starting from 15 October 2012, and all his results between 20 July 2009 and 20 September 2009, between 29 June 2010 and 29 August 2011, as well as between 17 December 2011 and 11 June 2012 (which include a world championship gold) were annulled.On March 25, 2015, the IAAF filed an appeal with the Court of Arbitration in Lausanne, Switzerland, suggesting inappropriate selective disqualification periods were attributed by RUSADA, which alludes to but is not specified in the public announcement, the strange gap between Kirdyapkin's suspension dates allowing him to keep his Olympic Gold Medal.  As of April 16, the IAAF have not changed the results of the World Cup victory, which would fall under the existing RUSADA suspension period.
coach manager chief coach head trainer head manager