Sedoykina started her career at
Akva Volgograd, where she won the 2008
EHF Cup and the 2001, 2009, 2010, 2011, and 2012 Russian Championship. She also reached the
final four of the
2014-15 Champions League. In 2015, she joined
Rostov-Don. Here, she won the 2017
EHF Cup and the Russian Championship every year from 2016-17 to 2019-20. In 2020, she joined
CSKA Moscow. With the Moscow club, she won the 2021 Russian Championship and 2022 Russian Cup. After the 2021-22 season, she retired. From March 2024, she has been the Goalkeeping Coach at her former club
CSKA Moscow. ==National team==