Ekaterina Zavyalova

In November 2015, after an investigation, Poistogova was one of five Russian runners whom the World Anti-Doping Agency recommended to receive a lifetime ban for doping during the London Olympics. On 7 April 2017, CAS refused to backdate disqualification as far back as 2012, and disqualifed Poistogova from 2015. Thus, Poistogova retained her upgraded 2012 Olympic silver medal at women's 800 metres athletic event.

In the 2012 London Olympics, Poistogova placed second in her first-round heat with a time of 2:01.08. She placed second in the semifinals with a time of 1:59.45. She won the bronze medal that day in the 800 m final with a time of 1:57.53 behind fellow Russian and world champion Mariya Savinova (1:56.19) and Caster Semenya of South Africa (1:57.23).

Ekaterina Zavyalova, former married name Poistogova (born 1 March 1991) is a Russian athlete, who specializes in the 800 metres. She is best known for initially winning the bronze medal in the 800 meters at the 2012 London Olympics, but in 2015, her bronze was upgraded to silver after countrywoman Mariya Savinova's lifetime ban from competition due to doping, which had annulled all Savinova's results backdating to July 2010 and stripped Savinova's 2012 Olympic gold medal.

Zavyalova was born on 1 March 1991 in Arzamas. After marrying fellow middle-distance runner Stepan Poistogov, she adopted the feminine form of his surname, Poistogova. She returned to her birth name following their divorce.