On 20 June 2026, Brooke Overholt (Canada) ran their 400 metres hurdles in 56.53 seconds at Ottawa (Canada Championships).
| 19.04 |
| 7.99 |
16 R |
R |
| H5 | 4.63(+0.25) | 23.67 | 7.56 | 16 L | L |
| H6 | 5.04(+0.41) | 28.71 | 6.94 | — — | — |
| H7 | 5.19(+0.15) | 33.90 | 6.74 | — — | — |
| H8 | 5.20(+0.01) | 39.10 | 6.73 | 17 L | L |
| H9 | 5.57(+0.37) | 44.67 | 6.28 | 18 R | R |
| H10 | 5.63(+0.06) | 50.30 | 6.22 | 18 L | L |
| Finish | 6.23 | 56.53 | 6.42 | — — | — |
Avg. interval
4.87s
Std. deviation
0.55
Deceleration
Stride pattern
High variability between intervals (σ=0.55s).
Fastest interval: 4.03s (H2–H3).
High deceleration: 16.3% speed loss in the second half (7.82 → 6.54 m/s), to work on with speed endurance.
Stutter on H9.
Lead leg alternation: 6× Left, 2× Right.