On 21 July 2023, Alison Dos Santos (Brazil) ran their 400 metres hurdles in 47.66 seconds at Monaco (Diamond League).
On 4h/world, this time earns Alison a Top 12% World ranking.
| 16.64 |
| 9.62 |
12 L |
L |
| H5 | 3.84(+0.20) | 20.48 | 9.11 | 12 R | R |
| H6 | 3.92(+0.08) | 24.40 | 8.93 | 12 L | L |
| H7 | 4.16(+0.24) | 28.56 | 8.41 | 13 L | L |
| H8 | 4.24(+0.08) | 32.80 | 8.25 | 13 L | L |
| H9 | 4.44(+0.20) | 37.24 | 7.88 | 13 L | L |
| H10 | 4.89(+0.45) | 42.13 | 7.16 | 14 R | R |
| Finish | 5.53 | 47.66 | 7.23 | — — | — |
Avg. interval
4.04s
Std. deviation
0.41
Deceleration
Stride pattern
Fastest interval: 3.56s (H2–H3).
Deceleration of 12.4% between the first half (9.03 m/s) and the second half (7.91 m/s).
Steady stride pattern.
Lead leg alternation: 7× Left, 3× Right.
All-time slowest sectors
Max speed
9.83m/s
Avg speed
8.39m/s
Std. deviation
0.41s