Olga Valeryevna Medvedtseva (Russian: Ольга Валерьевна Медведцева), former Pyleva (Russian: Пылёва), née Zamorozova (Russian: Заморозова), (born 7 July 1975) is a former Russian biathlete.

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Olga Medvedtseva
Full name	Olga Valeryevna Medvedtseva
Born	(1975-07-07) July 7, 1975 (age 48) Borodino, Krasnoyarsk Krai, Russian SFSR Soviet Union
Height	1.63 m (5 ft 4 in)
Ski club	CSKA Moscow
World Cup career
Seasons	2000-2010
Podiums	37
Wins	10
Medal record Representing  Russia Women's biathlon Olympic Games 2002 Salt Lake City 10 km pursuit 2010 Vancouver 4 × 6 km relay 2002 Salt Lake City 4 × 7.5 km relay Disqualified 2006 Turin 15 km individual World Championships 2000 Oslo 4 × 7.5 km relay 2001 Pokljuka 4 × 7.5 km relay 2004 Oberhof 15 km individual 2005 Hochfilzen 4 × 6 km relay 2005 Khanty-Mansiysk Mixed relay 2009 Pyeongchang 4 × 6 km relay 2002 Oslo 12.5 km mass start 2004 Oberhof 4 × 6 km relay 2005 Hochfilzen 12.5 km mass start Women's cross-country skiing Junior World Championships 1993 Harrachov 4 × 5 km relay 1995 Gällivare 4 × 5 km relay 1994 Breitenwang 15 km freestyle 1994 Breitenwang 5 km classical 1995 Gällivare 5 km classical
Updated on January 23, 2010.

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At the 2002 Winter Olympics, she won an individual gold medal in the 10 km pursuit, as well as the bronze medal in the team relay. She won her second gold at the 2010 Winter Olympics in a relay.

Pyleva also won twice at the Holmenkollen ski festival biathlon competition during the 2004–05 season in the sprint and pursuit events.

She retired after the 2009–10 season.^[1]

At the 2006 Winter Olympics she won the silver in the women's 15 km individual race, but on February 16, 2006, she was disqualified from further competition for failing a drug test when she tested positive for the stimulant carphedon. The International Olympic Committee panel found her guilty, and she was expelled from the games and stripped of her medal. She was then banned for two years from competition, and the authorities in Turin started a criminal investigation into the matter. The head of the Russian Anti-Doping Committee claimed that Pyleva took an over-the-counter medication for an ankle injury prescribed by her personal doctor who is not a team doctor, which contained carphedon.^[2]

• Russia at the 2006 Winter Olympics
• List of sportspeople sanctioned for doping offences