On 19 July 2022, Alison Dos Santos (Brazil) ran their 400 metres hurdles in 46.29 seconds at Eugene (World Championships).
On 4h/world, this time earns Alison a Top 2% World ranking.
This performance is the south America record U23.
| 16.41 |
| 9.97 |
12 L |
L |
| H5 | 3.72(+0.21) | 20.13 | 9.41 | 12 R | R |
| H6 | 3.90(+0.18) | 24.03 | 8.97 | 12 L | L |
| H7 | 4.09(+0.19) | 28.12 | 8.56 | 13 L | L |
| H8 | 4.20(+0.11) | 32.32 | 8.33 | 13 L | L |
| H9 | 4.37(+0.17) | 36.69 | 8.01 | 13 L | L |
| H10 | 4.40(+0.03) | 41.09 | 7.95 | 13 L | L |
| Finish | 5.20 | 46.29 | 7.69 | — — | — |
Avg. interval
3.93s
Std. deviation
0.33
Deceleration
Stride pattern
Fastest interval: 3.51s (H4–H5).
Deceleration of 10.6% between the first half (9.19 m/s) and the second half (8.22 m/s).
Steady stride pattern.
Lead leg alternation: 8× Left, 2× Right.
All-time fastest sectors
Max speed
9.97m/s
Avg speed
8.64m/s
Std. deviation
0.33s