The Women's 400 Individual Medley (or "I.M.") swimming event at the 2009 SEA Games was held in December 2009.
The Games Record at the start of the event was 4:51.87, swum by Joscelin Yeo at the 1999 SEA Games (on August 13).
Results
Final Place Swimmer Nation Time Notes 1 Natthanan J. 4:55.07 2 QUAH Ting Wen 4:56.32 3 Hui Yu Koh 4:56.73 4 Fibriani Marita 4:57.16 5 Chavisa T. 4:58.30 6 SIOW Yi Ting 5:05.45 7 T Kim Tuyen Nguyen 5:05.45 8 Ressa Ressa 5:17.78
Preliminary heats Rank Swimmer Nation Time Notes 1 Fibriani Marita 5:09.82 Q 2 SIOW Yi Ting 5:11.21 Q 3 Chavisa T. 5:13.84 Q 4 Natthanan J. 5:18.71 Q 5 Ressa Ressa 5:19.18 Q 6 QUAH Ting Wen 5:19.06 Q 7 Hui Yu Koh 5:20.33 Q 8 T Kim Tuyen Nguyen 5:27.06 Q 9 Wei Li Lai 5:27.23
References