400m Hurdles Semis-Women More Results All 10000m Run-Men 10000m Run-Women 100m Finals-Men 100m Finals-Women 100m Hurdles Finals-Women 100m Hurdles Prelims-Women 100m Hurdles Semis-Women 100m Prelims-Men 100m Prelims-Women 100m Semis-Men 100m Semis-Women 110m Hurdles Finals-Men 110m Hurdles Prelims-Men 110m Hurdles Semis-Men 1500m Run Finals-Men 1500m Run Finals-Women 1500m Run Semis-Men 1500m Run Semis-Women 200m Finals-Men 200m Finals-Women 200m Prelims-Men 200m Prelims-Women 200m Semis-Men 200m Semis-Women 20K Racewalk-Men 20K Racewalk-Women 3000m Steeplechase Finals-Men 3000m Steeplechase Finals-Women 3000m Steeplechase Semis-Men 3000m Steeplechase Semis-Women 400m Finals -Men 400m Finals -Women 400m Hurdles Finals-Men 400m Hurdles Finals-Women 400m Hurdles Prelims-Men 400m Hurdles Prelims-Women 400m Hurdles Semis-Men 400m Hurdles Semis-Women 400m Prelims-Men 400m Prelims-Women 400m Semis-Men 400m Semis-Women 5000m Run-Men 5000m Run-Women 800m Finals-Men 800m Finals-Women 800m Prellims-Men 800m Prellims-Women 800m Semis-Men 800m Semis-Women Complete Results Decathlon Discus-Men Discus-Women Hammer-Men Hammer-Women Heptathlon High Jump-Men High Jump-Women Javelin-Men Javelin-Women Long Jump-Men Long Jump-Women Pole Vault-Men Pole Vault-Women Shot Put-Men Shot Put-Women Triple Jump-Men Triple Jump-Women Women's 400 Meter Hurdles Senior - Semi-Final View event records PlaceAthlete NameAffiliationTimeQualReacTimeHeat(Pl) 1Lashinda DemusNike55.35Q0.1901 (1) 2Takecia JamesonMiami55.97Q0.3211 (2) 3Ti'erra Brownunattached56.06Q0.2212 (1) 4Latoya JamesNorth Carolina56.08Q0.1811 (3) 5Jasmine ChaneyArizona State56.15Q0.2402 (2) 6Christine Spenceunattached56.26Q0.1831 (4) 7Turquoise ThompsonU C L A56.71Q0.1662 (3) 8MacKenzie Hillunattached56.730.2401 (5) 9Queen HarrisonSaucony56.86Q0.2032 (4) 10Latosha WallaceAsics57.000.2672 (5) 11Tiffany Williamsunattached57.240.4061 (6) 12Ayla SmithVirginia57.310.2532 (6) 13Ellen WorthamTennessee57.920.2951 (7) 14Nicole LeachNike58.460.2622 (7) 15Landria Buckleyunattached58.890.2182 (8) 16Jernail Hayesunattached1:04.680.2441 (8)