2008 Summer Olympics World Record Breakers Country Event World Record Competitor South Korea Archery (Team W) 231/240 (228) Park, Ok-hee, Hyun-jung USA 400m Ind. Medley (M) 4:07.82 (4:08.26) Michael Phelps Australia 400m Ind. Medley (W) 4:29:45 (4:31.12) Stephanie Rice Zimbabwe 100m Backstroke (W) 58.77 (58.97) Kirsty Coventry Japan 100m Breaststroke (M) 58.91 (59.13) Kosuke Kitajima USA 4x100m Freestyle Relay (Team M) 3:08.24 (5 teams break WR) M. Phelps, J. Lezak, C. Jones, G. Weber-Gale USA 200m Butterfly (M) 1:52.03 (1:52.09) Michael Phelps USA 200m Freestyle (M) 1:42.96 (1:43.86) Michael Phelps USA 100m Backstroke (M) 52.54 (52.89) Aaron Peirsol Italy 200m Freestyle (W) 1:54.82 (1:55.45) Federica Pellegrini USA 200m Backstroke (M) 1:53.94 (154.32) Ryan Lochte United Kingdom 800m Freestyle (W) 8.14.10 (8:16.22) Rebecca Adlington Jamaica 100m Track 9.69 (9.72) Usain Bolt Russia Pole Vault 5.05m (5.04) Elena Isinbaeva Jamaica 200m Track 19.30 (19.64) Usain Bolt