On 27 August 2026, Alison Dos Santos (Brazil) ran their 400 metres hurdles in 45.80 seconds at Zürich (Diamond League).
On 4h/world, this time earns Alison a Top 1 World ranking.
This performance is the records:
| 16.46 |
| 9.67 |
12 L |
L |
| H5 | 3.71(+0.09) | 20.17 | 9.43 | 12 R | R |
| H6 | 3.81(+0.10) | 23.98 | 9.19 | 12 L | L |
| H7 | 4.05(+0.24) | 28.03 | 8.64 | 13 L | L |
| H8 | 4.03(-0.02) | 32.06 | 8.68 | 13 L | L |
| H9 | 4.23(+0.20) | 36.29 | 8.27 | 13 L | L |
| H10 | 4.45(+0.22) | 40.74 | 7.87 | 13 L | L |
| Finish | 5.06 | 45.80 | 7.91 | — — | — |
Avg. interval
3.89s
Std. deviation
0.30
Deceleration
Stride pattern
New personal best!
New national record!
New area record!
World record performance!
Very consistent intervals (σ=0.3s).
Fastest interval: 3.52s (H2–H3).
Excellent fatigue resistance: only 8.5% speed loss between the first and second halves (9.17 → 8.39 m/s).
Steady stride pattern.
Lead leg alternation: 8× Left, 2× Right.
All-time fastest sectors
Max speed
9.94m/s
Avg speed
8.73m/s
Std. deviation
0.30s