| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 177 | Daimà PernÃa |
CUB
|
53.81 Q WL | 0.198 |
| 2 | 537 | Nezha Bidouane |
MAR
|
53.85 Q SB | 0.180 |
| 3 | 456 | Debbie-Ann Parris-Thymes |
JAM
|
53.88 Q PB | 0.144 |
| 4 | 823 | Sandra Glover |
USA
|
55.04 Q SB | 0.153 |
| 5 | 612 | Malgorzata Pskit |
POL
|
55.28 | 0.182 |
| 6 | 115 | Karlene Haughton |
CAN
|
55.68 SB | 0.212 |
| 7 | 433 | Monika Niederstatter |
ITA
|
56.37 | 0.195 |
| 8 | 493 | Natalya Torshina-Alimzhanova |
KAZ
|
56.45 | 0.246 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 693 | Yuliya Pechonkina |
RUS
|
54.03 Q | 0.125 |
| 2 | 809 | Tonja Buford-Bailey |
USA
|
54.15 Q SB | 0.159 |
| 3 | 446 | Deon Hemmings |
JAM
|
54.47 Q SB | 0.234 |
| 4 | 656 | Ionela Târlea |
ROU
|
54.92 Q | 0.169 |
| 5 | 607 | Anna Jesien |
POL
|
55.64 | 0.207 |
| 6 | 851 | Brenda Taylor |
USA
|
56.52 | 0.181 |
| 7 | 630 | Yvonne Harrison |
PUR
|
56.70 | 0.165 |
| 8 | 291 | Sinead Dudgeon |
GBR
|
56.92 | 0.179 |