The Women's 200m Individual Medley at the 2007 World Aquatics Championships took place on 25 March and the evening of 26 March (finals) at the Rod Laver Arena in Melbourne, Australia. 50 swimmers were entered in the event, of which 49 swam.
This article includes the world record progression for the 4×200 metres freestyle relay, and it shows the chronological history of world record times in that competitive swimming event. The 4×200 metres freestyle relay is a relay event in which each of four swimmers on a team swims a 200-metre freestyle leg in sequence. The world records are recognized by and maintained by FINA, the international competitive swimming and aquatics federation that oversees the sport in international competition.
The men's 1500 metre freestyle at the 2007 World Aquatics Championships was held on the morning of 31 March (heats) and the evening of 1 April (final) at Rod Laver Arena in Melbourne, Australia. 50 swimmers were entered in the event, of which 47 swam.
The Women's 800m Freestyle at the 2007 World Aquatics Championships took place on the morning of 30 March (prelims) and the evening of 31 March (finals) at the Rod Laver Arena in Melbourne, Australia.
The Women's 50m Backstroke at the 2007 World Aquatics Championships took place on 28 March and the evening of 29 March (finals) at the Rod Laver Arena in Melbourne, Australia. 95 swimmers were entered in the event, of which, 93 swam.
The Women's 100m Backstroke at the 2007 World Aquatics Championships took place on 26 March and the evening of 27 March (finals) at the Rod Laver Arena in Melbourne, Australia. 87 swimmers were entered in the event, of which, 86 swam.
The Women's 100m Breaststroke at the 2007 World Aquatics Championships took place on 26 March and the evening of 27 March (finals) at the Rod Laver Arena in Melbourne, Australia. 72 swimmers were entered in the event, of which 70 swam.
The Women's 50m Butterfly at the 2007 World Aquatics Championships took place on 30 March and the evening of 31 March (finals) at the Rod Laver Arena in Melbourne, Australia. 99 swimmers were entered in the event, of whom 93 swam.
The Women's 4 × 200 m Freestyle Relay at the 2007 World Aquatics Championships took place on 29 March 2007 at the Rod Laver Arena in Melbourne, Australia. The top-12 finishers from this race qualified for the event at the 2008 Olympics. 25 teams were entered in the event; all swam.
The men's 4×100 metre freestyle relay at the 2007 World Aquatics Championships took place on 25 March 2007 at the Rod Laver Arena in Melbourne, Australia. The top-12 finishers from this race qualified for the event at the 2008 Olympics. 35 teams entered in the event, of which 34 swam.
The men's 200 metre breaststroke at the 2007 World Aquatics Championships took place on 29 March and on the evening of 30 March (final) at Rod Laver Arena in Melbourne, Australia. 85 swimmers were entered in the event, of which 79 swam.
The heats for the Women's 1500 m Freestyle race at the 2009 World Championships took place on the morning of 27 July and the final was held in the evening session of 28 July at the Foro Italico in Rome, Italy.
The men's 1500 metre freestyle at the 2005 World Aquatics Championships occurred on the morning of 30 July (heats) and in the evening of 31 July (final) in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 34 swimmers were entered in the event, of which 33 swam.
The Men's 200 Freestyle at the 11th FINA World Aquatics Championships swam 25+26 July 2005 in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 95 swimmers were entered in the Preliminary heats, which swam in the morning of July 25. The top-16 swimmers from the Prelims advanced on to Semifinal heats that evening. From the Semifinals, the top-8 swimmers advanced onto the next night's Final.
The men's 100 metre freestyle at the 2005 World Aquatics Championships occurred on 27 July and in the evening of 28 July (final) in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 131 swimmers were entered in the event, of which 124 swam in one of 17 preliminary heats. The top-16 swimmers from the heats advanced on to semifinals; the top-8 swimmers in the two semifinals heats advanced onto the next night's final.
The Women's 1500 Freestyle event at the 11th FINA World Aquatics Championships was swum on 25 – 26 July 2005 in Montreal, Quebec, Canada. Preliminary heats were swum during the morning session on 25 July with the top-8 finishers advancing to swim again in the event's final heat during the evening session on 26 July.
The Men's 1500 metre Freestyle event at the 10th FINA World Aquatics Championships swam on July 26–27, 2003 in Barcelona, Spain. Preliminary heats swam in the morning session on July 26, with the top-8 finishers advancing to swim again in the Final during the evening session on July 27.
The Women's 50m Freestyle event at the 10th FINA World Aquatics Championships swam on 26–27 July 2003 in Barcelona, Spain. Preliminary and semifinal heats swam on July 26, while the Final swam on July 27.
The Women's 800m Freestyle event at the 10th FINA World Aquatics Championships swam on 25–26 July 2003 in Barcelona, Spain. Preliminary heats swam during the morning session on July 25, with the top-8 finishers advancing to swim the race again in the Final during the evening session on July 26.
The Women's 1500m Freestyle event at the 10th FINA World Aquatics Championships swam on 21–22 July 2003 in Barcelona, Spain. Preliminary heats swam during the morning session on July 21, with the top-8 finishers advancing to swim again in the event's Final during the evening session on July 22.
USA 
Switzerland 
Japan 
Spain 
Denmark 
Chile 
France 
China 
Great Britain 
Canada 
Hungary 
Slovenia 
El Salvador 
Hong Kong 
Singapore 
Seychelles 
Peru 
Morocco 
