During the Russian Indoor meeting in Moscow in January 2008, she set a new national record in the women's mile run with a time of 4:20.21 minutes, which was the third fastest of all-time.

[2] She also holds the national indoor record for 800 m, set in Moscow during the 2008 season.

Soboleva was selected to represent Russia in both the 800 m and 1500 m at the 2008 Summer Olympics in Beijing, but was suspended from competition, after the discovery of doping test irregularities.

[3] On 20 October 2008, it was announced that Soboleva, along with six other Russian athletes would receive two-year doping bans for manipulating drug samples.

[5] On 7 April 2021, Soboleva was banned from athletics for 8 years by the Court of Arbitration for Sport with all of her competitive results from 1 May 2011 to 15 December 2016 disqualified.