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 men's 400 metre freestyle at the 2005 World Aquatics Championships took place on 24 July in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 57 swimmers were entered and in the event in the preliminary heats, the top-8 of which advanced on to swim again in the final heat that event.
The swimming portion of the 2011 FINA World Championships was held July 24–31 at the Shanghai Oriental Sports Center in Shanghai, China. Swimming is one of five aquatic disciplines at the championships.
The men's 200 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships took place July 25 and 26. The heats and semifinals took place July 25 and the final was held July 26.
The men's 4×100 metre freestyle relay competition of the swimming events at the 2011 World Aquatics Championships took place July 24. The heats and final took place July 24.
The women's 100 metre butterfly competition of the swimming events at the 2011 World Aquatics Championships took place on 24 and 25 July. The heats and semifinals took place on 24 July and the final was held on 25 July.
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 men's 50 metre butterfly 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 freestyle competition of the swimming events at the 2011 World Aquatics Championships took place July 24. The heats and the final took place on July 24.
The men's 100 metre breaststroke 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 men's 50 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 29 with the heats and the semifinals and July 30 with the final.
The women's 4×100 metre freestyle relay competition of the swimming events at the 2011 World Aquatics Championships took place July 24. The heats and final took place July 24.
The men's 200 metre individual medley competition of the swimming events at the 2011 World Aquatics Championships took place July 27 and 28. The heats and semifinals took place July 27 and the final was held July 28.
The women's 200 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 26 with the heats and the semifinals and July 27 with the final.
The men's 800 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 26 with the heats and July 27 with the final.
The men's 100 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 27 with the heats and the semifinals and July 28 with the final.
The men's 1500 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 30 with the heats and the semifinals and July 31 with the final.
The women's 50 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships was held on July 30 with the heats and the semifinals and July 31 with 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 men's 100 metre freestyle competition of the swimming events at the 2012 European Aquatics Championships took place May 24 and 25. The heats and semifinals took place on May 24, the final on May 25.
