| Sectors | Splits | Cumulative | Strides | Lead leg |
|---|---|---|---|---|
| Start - H1 | 6.08 | 6.08 | — | G |
| H2 | 3.80 | 9.88 | 13 | G |
| H3 | 3.87(+0.07) | 13.75 | 13 | G |
| H4 | 3.93(+0.06) | 17.68 | 13 | G |
| H5 | 4.03(+0.10) | 21.71 | 13 | G |
| H6 | 4.17(+0.14) | 25.88 | 14 | D |
| H7 | 4.13(-0.04) | 30.01 | 14 | G |
| H8 | 4.27(+0.14) | 34.28 | 15 | G |
| H9 | 4.40(+0.13) | 38.68 | 15 | G |
| H10 | 4.60(+0.20) | 43.28 | — | — |
| Finish | 5.40 | 48.68 | — | — |
Total time
Avg. interval
4.13s
Std. deviation
0.25
Deceleration
Stride pattern
Very consistent intervals (σ=0.25s).
Fastest interval: 3.8s (H2–H3).
Excellent fatigue resistance: only 6.4% speed loss between the first and second halves (8.52 → 7.97 m/s).
Lead leg alternation: 8× Left, 1× Right.
Stride count and lead leg, hurdle by hurdle
Percentile position, sector by sector
Faster than 35% of 400m hurdles Elite-level.
Actual percentile: 35
n = 155 races · 76 athletes
Position within the pacing-consistency distribution (a higher value isn't necessarily a better race).
Position within the speed-loss distribution between the two race halves (a low value isn't always better pacing).
Hurdle fault rate, compared to the database.
On 12 July 2026, James Smith II (United States) ran their 400 metres hurdles in 48.68 seconds at Edmonton (Edmonton Meeting).
The closest performance recorded on 4h/world belongs to Xinfeng Xu (48.68s at Ordos), with 0.00 seconds away.