At the Olympic Games in London, Catherine won a silver medal in the 800 meters.
Also in 2012, she won the Znamensky Brothers Memorial and the Russian Championship.
In the 800 meters event at the 2012 Summer Olympics, Guliyeva placed second in her first-round heat with a time of 2:01.08. She then 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 Mariya Savinova (1:56.19) and Caster Semenya of South Africa (1:57.23).
In November 2015, after an investigation that completed that year, Guliyeva (along with four other Russian runners) was recommended by the World Anti-Doping Agency to receive a retroactive lifetime ban for doping during the 2012 Olympics.[2][3] On 7 April 2017, CAS refused to backdate disqualification as far back as 2012, and disqualified Guliyeva from 2015.[4] Her 2012 Olympic bronze medal was upgraded to silver after countrywoman Mariya Savinova's lifetime ban from competition due to doping, which annulled all of Savinova's results backdating to July 2010 and stripped Savinova's 2012 Olympic gold medal.
Ekaterina Ivanovna Guliyeva (March 1, 1991, Arzamas) - Russian athlete, Olympic silver medalist in the 800 meters, Honored Master of Sports of Russia.
Surname in girlhood Zavyalova.
She was married to Russian athlete Stepan Poistogov.
In 2019, Ekaterina Zavyalova married a Turkish athlete of Azerbaijani origin Ramil Guliyev and took his last name and changed her last name to Guliyev on the Instagram page.
In 2020, her daughter Ailita was born.

