On 23 July 2023, Femke Broeders-Bol (Netherlands) ran their 400 metres hurdles in 51.45 seconds at Londres (Diamond League).
On 4h/world, this time earns Femke a Top 1% World ranking.
| 18.61 |
| 8.50 |
14 R |
R |
| H5 | 4.20(+0.08) | 22.81 | 8.33 | 14 L | L |
| H6 | 4.48(+0.28) | 27.29 | 7.81 | 14 R | R |
| H7 | 4.48(0.00) | 31.77 | 7.81 | 14 L | L |
| H8 | 4.68(+0.20) | 36.45 | 7.48 | 15 L | L |
| H9 | 4.80(+0.12) | 41.25 | 7.29 | 15 L | L |
| H10 | 4.80(0.00) | 46.05 | 7.29 | 15 L | L |
| Finish | 5.40 | 51.45 | 7.41 | — — | — |
Avg. interval
4.41s
Std. deviation
0.29
Deceleration
Stride pattern
Very consistent intervals (σ=0.29s).
Fastest interval: 4.04s (H2–H3).
Excellent fatigue resistance: only 7.4% speed loss between the first and second halves (8.11 → 7.51 m/s).
Steady stride pattern.
Lead leg alternation: 7× Left, 3× Right.
All-time fastest sectors
Max speed
8.66m/s
Avg speed
7.77m/s
Std. deviation
0.29s