On 28 July 2019, Sydney McLaughlin-Levrone (United States) ran their 400 metres hurdles in 52.88 seconds at Des Moines (United States Championships).
On 4h/world, this time earns Sydney a Top 8% World ranking.
| 18.99 |
| 8.27 |
15 R |
R |
| H5 | 4.37(+0.14) | 23.36 | 8.01 | 15 R | R |
| H6 | 4.53(+0.16) | 27.89 | 7.73 | 15 R | R |
| H7 | 4.60(+0.07) | 32.49 | 7.61 | 15 R | R |
| H8 | 4.80(+0.20) | 37.29 | 7.29 | 15 R | R |
| H9 | 5.00(+0.20) | 42.29 | 7.00 | 16 L | L |
| H10 | 4.97(-0.03) | 47.26 | 7.04 | 16 R | R |
| Finish | 5.62 | 52.88 | 7.12 | — — | — |
Avg. interval
4.53s
Std. deviation
0.33
Deceleration
Stride pattern
Fastest interval: 4s (H2–H3).
Excellent fatigue resistance: only 8% speed loss between the first and second halves (7.92 → 7.28 m/s).
Lead leg alternation: 1× Left, 8× Right.
Max speed
8.75m/s
Avg speed
7.56m/s
Std. deviation
0.33s