On 23 August 2026, Alison Dos Santos (Brazil) ran their 400 metres hurdles in 46.43 seconds at Chorzów (Diamond League).
On 4h/world, this time earns Alison a Top 2% World ranking.
| 16.59 |
| 9.59 |
12 L |
L |
| H5 | 3.81(+0.16) | 20.40 | 9.19 | 12 R | R |
| H6 | 4.01(+0.20) | 24.41 | 8.73 | 13 R | R |
| H7 | 4.11(+0.10) | 28.52 | 8.52 | 13 R | R |
| H8 | 4.15(+0.04) | 32.67 | 8.43 | 13 R | R |
| H9 | 4.35(+0.20) | 37.02 | 8.05 | 13 R | R |
| H10 | 4.38(+0.03) | 41.40 | 7.99 | 13 R | R |
| Finish | 5.03 | 46.43 | 7.95 | — — | — |
Avg. interval
3.96s
Std. deviation
0.30
Deceleration
Stride pattern
Very consistent intervals (σ=0.3s).
Fastest interval: 3.55s (H2–H3).
Excellent fatigue resistance: only 8.9% speed loss between the first and second halves (9.07 → 8.26 m/s).
Steady stride pattern.
Lead leg alternation: 3× Left, 7× Right.
Max speed
9.86m/s
Avg speed
8.62m/s
Std. deviation
0.30s