 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.