Career
However, she had little success in the following years, placing only fifth in the heats of the 2004 World Junior Championships. She did not improve on her personal best in 2005 or 2006, and only competed on the national level However, she began to steadily improve her performances in 2007 and 2008, posting seasonal bests of 52.32 s and 51.24 s respectively.
Later that year, during the semifinals at the Russian national championships in Cheboksary, she lowered her outdoor 400 m personal best by nearly a full second by running 49.29 s, the second fastest time in the world that year.
With these strong performances, Krivoshapka was considered one of the favorites for a medal in the 400 m at the World Championships in Berlin. She suffered an injury in an unusual fashion in early 2010 – while doing sprint training on a track in Volgograd, a young boy walked into her path and she strained her back in the ensuing collision.
She missed the 2010 IAAF World Indoor Championships as a result but had fully recovered in time for the outdoor season. In the 2013 World Athletics Championships in Moscow, she took third in the individual 400 m race, but came back to anchor the Russian team to the gold medal in the 4 × 400 m relay.