On 12 July 2026, James Smith II (United States) ran their 400 metres hurdles in 48.68 seconds at Edmonton (Edmonton Meeting).
On 4h/world, this time earns James a Top 30% World ranking.
| 17.68 |
| 8.91 |
13 L |
L |
| H5 | 4.03(+0.10) | 21.71 | 8.68 | 13 L | L |
| H6 | 4.17(+0.14) | 25.88 | 8.39 | 14 R | R |
| H7 | 4.13(-0.04) | 30.01 | 8.47 | 14 L | L |
| H8 | 4.27(+0.14) | 34.28 | 8.20 | 15 L | L |
| H9 | 4.40(+0.13) | 38.68 | 7.95 | 15 L | L |
| H10 | 4.60(+0.20) | 43.28 | 7.61 | — — | — |
| Finish | 5.40 | 48.68 | 7.41 | — — | — |
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.