Women's 400m Round 1 - Heat 8
samedi 13 août 2016, 14h49 GMT – 19h49 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Christine Day | 51.54″ |
| 2 | Carline Muir | + 0.03″ |
| 3 | Malgorzata Holub | + 0.26″ |
| 4 | Geisa Aparecida Coutinho | + 0.51″ |
| 5 | Aliyah Abrams | + 1.25″ |
| 6 | Mariama Mamoudou | + 2.78″ |
| 7 | Anastassya Kudinova | + 4.49″ |