Marina Grigorievna Sidorova (, née Nikiforova; born 16 January 1950) is a Russian former Soviet track and field sprinter. She was a seven-time Soviet champion, winning over distances from 100 metres to 400 metres.Soviet Championships. GBR Athletics. Retrieved on 2017-04-03.Soviet Indoor Championships. GBR Athletics. Retrieved on 2017-04-03.
Born in Saint Petersburg (then Leningrad), she made her Olympic debut at age twenty-two and was a 200 metres semi-finalist and helped the Soviet women to fifth in the 4 × 100 metres relay.Marina Sidorova. Sports Reference. Retrieved on 2017-04-03. Her greatest individual success came at the 1978 European Athletics Indoor Championships, where she won the women's 400 metres title.European Indoor Championships (Women). GBR Athletics. Retrieved on 2017-04-03. She took a 400 m bronze at the 1977 IAAF World Cup and was twice a 200 m silver medallist at the Universiade.IAAF World Cup. GBR Athletics. Retrieved on 2017-04-03.Universiade (women). GBR Athletics. Retrieved on 2017-04-03. She also won three individual medals at the European Cup during her career.European Cup (women). GBR Athletics. Retrieved on 2017-04-03.
With the Soviet women's relay team, she won four bronze medals at major competitions. Her first came at the 1971 European Athletics Championships, alongside Lyudmila Zharkova, Galina Bukharina and Nadezhda Besfamilnaya.European Athletics Championships Zürich 2014 - STATISTICS HANDBOOK. European Athletics. Retrieved on 2017-04-03. She won medals in both 4 × 100 metres relay and 4 × 400 metres relay at the 1977 IAAF World Cup and returned two years later to win another bronze in the 4 × 400 metres relay in a team anchored by future Olympic champion Lyudmila Kondratyeva.IAAF World Cup . IAAF. Retrieved on 2017-04-03.
She was the daughter of two former athletes who became athletics coaches, Grigory Nikiforov and Valentina Nikiforova, who propagated a new training technique for distance running, based on long, low-speed runs and short high-speed runs.
Personal bests 60 metres – 7.65 (1973)Marina Sidorova. All-Athletics. Retrieved on 2017-04-03. 100 metres – 11.2 (1973)Marina Sidorova. Track and Field Brinkster. Retrieved on 2017-04-03. 200 metres – 22.72 (1973) 400 metres – 50.98 (1977)
International competitions 1971European ChampionshipsHelsinki, Finland3rd4 × 100 m relay44.51972Olympic GamesMunich, West Germany7th (semis)200 m23.405th4 × 100 m relay43.591973UniversiadeMoscow, Soviet Union2nd200 m22.72European CupEdinburgh, United Kingdom3rd100 m11.402nd200 m22.931974European ChampionshipsRome, Italy8th (semis)200 m24.661977European CupHelsinki, Finland2nd400 m51.20IAAF World CupDüsseldorf, West Germany3rd400 m51.293rd4 × 100 m relay42.913rd4 × 400 m relay3:27.0UniversiadeSofia, Bulgaria2nd200 m23.091978European Indoor ChampionshipsMilan, Italy1st400 m52.421979IAAF World CupMontreal, Canada3rd4 × 100 m relay42.52SpartakiadMoscow, Soviet Union3rd200 m23.45
National titles Soviet Athletics Championships 100 m: 1974 200 m: 1973, 1974, 1977 400 m: 1977 Soviet Indoor Athletics Championships 400 m: 1977, 1978
See also List of European Athletics Championships medalists (women) List of European Athletics Indoor Championships medalists (women)
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