She had her best achievements indoors, placing first or second in her both events at the world championships in 2004 and 2006 and at the European championships in 2011.
Her 4×400 m teams set two world indoor records, in 2004 and 2006, but only the former one was ratified.
Outdoors she won the world 4×400 m title in 2005 and placed second at the 2004 Olympics.She is married to the fellow sprinter Dmitry Forshev.