400 Metres Result | 9th IAAF World Championships in Athletics

First 2 in each heat (Q) and the next 2 fastest (q)

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	985	Amy Mbacke Thiam	SEN	50.78 Q	0.315
2	934	Svetlana Pospelova	RUS	50.84 Q	0.152
3	403	Lee McConnell	GBR	51.06 q SB	0.240
4	1155	Sanya Richards-Ross	USA	51.32	0.229
5	777	Olabisi Afolabi	NGR	51.38	0.182
6	609	Ronetta Smith	JAM	51.39	0.132
7	895	Heide Seyerling	RSA	51.89	0.185
8	500	Hazel Regis-Buckels	GRN	51.95	0.192

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	69	Tonique Williams-Darling	BAH	50.43 Q	0.161
2	593	Lorraine Fenton	JAM	50.45 Q	0.176
3	945	Olesya Zykina	RUS	50.96 q	0.152
4	1168	Demetria Washington	USA	51.31	0.215
5	1162	Deedee Trotter	USA	51.68	0.155
6	838	Grazyna Prokopek	POL	51.89	0.250
7	332	Makelesi Batimala	FIJ	52.27	0.168
8	1109	Antonina Yefremova	UKR	53.19	0.182

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	726	Ana Guevara	MEX	50.68 Q	0.194
2	930	Natalya Nazarova	RUS	50.92 Q	0.190
3	196	Mireille Nguimgo	CMR	51.19	0.180
4	105	Sviatlana Usovich	BLR	51.46	0.184
5	608	Sandie Richards	JAM	51.80 SB	0.223
6	61	Christine Amertil	BAH	51.85	0.160
7	556	Anna Tkach	ISR	52.25	0.214
8	547	Karen Shinkins	IRL	52.74	0.166