On 1 July 2021, Alison Dos Santos (Brazil) ran their 400 metres hurdles in 47.38 seconds at Oslo (Diamond League).
On 4h/world, this time earns Alison a Top 8% World ranking.
| 17.07 |
| 9.21 |
12 R |
R |
| H5 | 3.84(+0.04) | 20.91 | 9.11 | 12 L | L |
| H6 | 4.08(+0.24) | 24.99 | 8.58 | 13 L | L |
| H7 | 4.12(+0.04) | 29.11 | 8.50 | 13 L | L |
| H8 | 4.20(+0.08) | 33.31 | 8.33 | 13 L | L |
| H9 | 4.40(+0.20) | 37.71 | 7.95 | 13 L | L |
| H10 | 4.48(+0.08) | 42.19 | 7.81 | 13 L | L |
| Finish | 5.19 | 47.38 | 7.71 | — — | — |
Avg. interval
4.04s
Std. deviation
0.28
Deceleration
Stride pattern
Very consistent intervals (σ=0.28s).
Fastest interval: 3.64s (H2–H3).
Excellent fatigue resistance: only 8.2% speed loss between the first and second halves (8.85 → 8.12 m/s).
Steady stride pattern.
Lead leg alternation: 9× Left, 1× Right.
All-time slowest sectors
Max speed
9.62m/s
Avg speed
8.44m/s
Std. deviation
0.28s