 In 2006, Stadnik was disqualified for a period of one year for failing a doping test in 2006.Competing in the freestyle – 48 kg weight class, she won gold at the 2008 European Championships in Tampere and bronze at the 2008 Summer Olympics in Beijing.Stadnik went on to win gold at the 2009 European Championships in Vilnius, the 2009 World Championships in Herning,the 2019 World Championships in Nur-Sultan , and the 2011 European Championships in Dortmund.