On 26 July 2026, James Smith II (United States) ran their 400 metres hurdles in 48.53 seconds at New York (United States Championships). It's also their new personal best.
On 4h/world, this time earns James a Top 28% World ranking.
| 17.50 |
| 8.86 |
13 L |
L |
| H5 | 4.05(+0.10) | 21.55 | 8.64 | 13 L | L |
| H6 | 4.29(+0.24) | 25.84 | 8.16 | 14 R | R |
| H7 | 4.29(0.00) | 30.13 | 8.16 | 14 L | L |
| H8 | 4.41(+0.12) | 34.54 | 7.94 | 15 L | L |
| H9 | 4.26(-0.15) | 38.80 | 8.22 | 15 L | L |
| H10 | 4.41(+0.15) | 43.21 | 7.94 | 15 L | L |
| Finish | 5.32 | 48.53 | 7.52 | — — | — |
Avg. interval
4.14s
Std. deviation
0.23
Deceleration
Stride pattern
New personal best!
Very consistent intervals (σ=0.23s).
Fastest interval: 3.8s (H2–H3).
Excellent fatigue resistance: only 7.2% speed loss between the first and second halves (8.58 → 7.97 m/s).
Steady stride pattern.
Hurdle fault on H5.
Lead leg alternation: 9× Left, 1× Right.
All-time fastest sectors
All-time slowest sectors
Max speed
9.21m/s
Avg speed
8.24m/s
Std. deviation
0.23s