Yuliya Andreyevna Yefimova is a Russian competitive swimmer. She is the Russian national record holder in the 200 metre individual medley, 50 metre breaststroke, 100 metre breaststroke, and 200 metre breaststroke. After making her Olympic debut in 2008, she went on to win the bronze medal in the 200 metre breaststroke in 2012, and silver medals in the 100 metre and 200 metre breaststroke in 2016. She is a six-time World Champion, winning the 50 metre breaststroke in 2009 and 2013, the 100 metre breaststroke in 2015, and the 200 metre breaststroke in 2013, 2017, and 2019. She is also a former world record holder in the 50 metre breaststroke.
The men's 400 metre individual medley event at the 2009 World Aquatics Championships took place on August 2 at the Foro Italico. The heats were held during the morning session and the final were held during the evening session. This swimming event used medley swimming. Because the swimming pool is 50 metres long, this race consisted of eight lengths of the pool. The first two lengths were swum using the butterfly stroke, the second pair with the backstroke, the third pair of lengths in breaststroke, and the final two were freestyle. Unlike other events using freestyle, swimmers could not use butterfly, backstroke, or breaststroke for the freestyle leg; most swimmers use the front crawl in freestyle events.
The women's 200 metre individual medley competition of the swimming events at the 2011 World Aquatics Championships took place July 24 and 25. The heats and semifinals took place July 24 and the final was held July 25.
The women's 400 metre individual medley competition of the swimming events at the 2011 World Aquatics Championships was held on July 31 with the heats the final.
The men's 400 metre freestyle competition of the swimming events at the 2012 European Aquatics Championships took place May 21. The heats and final took place on May 21.
The women's 50 metre butterfly competition of the swimming events at the 2012 European Aquatics Championships took place May 21 and 22. The heats and semifinals took place on May 21, the final on May 22.
The women's 200 metre backstroke competition of the swimming events at the 2012 European Aquatics Championships took place May 21 and 22. The heats and semifinals took place on May 21, the final on May 22.
The women's 4 × 100 metre freestyle relay competition of the swimming events at the 2012 European Aquatics Championships took place May 21. The heats and final took place on May 21.
The women's 100 metre breaststroke competition of the swimming events at the 2012 European Aquatics Championships took place May 22 and 23. The heats and semifinals took place on May 22, the final on May 23.
The men's 200 metre individual medley competition of the swimming events at the 2012 European Aquatics Championships took place May 22 and 23. The heats and semifinals took place on May 22, the final on May 23.
The women's 100 metre freestyle competition of the swimming events at the 2012 European Aquatics Championships took place May 22, 2012 (heats) and May 23, 2012 (final).
The women's 200 metre individual medley competition of the swimming events at the 2012 European Aquatics Championships took place May 23 and 24. The heats and semifinals took place on May 23, the final on May 24.
The women's 200 metre freestyle competition of the swimming events at the 2012 European Aquatics Championships took place May 25 and 26. The heats and semifinals took place on May 25, the final on May 26.
The women's 50 metre backstroke competition of the swimming events at the 2012 European Aquatics Championships took place May 25 and 26. The heats and semifinals took place on May 25, the final on May 26.
The women's 50 metre breaststroke competition of the swimming events at the 2012 European Aquatics Championships took place May 26 and 27. The heats and semifinals took place on May 26, the final on May 27.
The women's 50 metre freestyle competition of the swimming events at the 2012 European Aquatics Championships took place May 26 and 27. The heats and semifinals took place on May 26, the final on May 27.
The women's 400 metre freestyle competition of the swimming events at the 2012 European Aquatics Championships took place May 27. The heats and final took place on May 27.
The men's 400 metre individual medley competition of the swimming events at the 2012 European Aquatics Championships took place May 27. The heats and final took place on May 27.
The women's 4 × 100 metre medley relay competition of the swimming events at the 2012 European Aquatics Championships took place May 27. The heats and final took place on May 27.
The men's 4 × 100 metre medley relay competition of the swimming events at the 2012 European Aquatics Championships took place May 27. The heats and final took place on May 27.
