On 28 May 2022, Khallifah Rosser (United States) ran their 400 metres hurdles in 48.10 seconds at Eugene (Diamond League). It's also their new personal best.
On 4h/world, this time earns Khallifah a Top 23% World ranking.
| 17.12 |
| 9.14 |
13 R |
R |
| H5 | 3.90(+0.07) | 21.02 | 8.97 | 13 R | R |
| H6 | 4.10(+0.20) | 25.12 | 8.54 | 13 R | R |
| H7 | 4.17(+0.07) | 29.29 | 8.39 | 14 L | L |
| H8 | 4.27(+0.10) | 33.56 | 8.20 | 14 R | R |
| H9 | 4.57(+0.30) | 38.13 | 7.66 | 15 R | R |
| H10 | 4.63(+0.06) | 42.76 | 7.56 | 15 R | R |
| Finish | 5.34 | 48.10 | 7.49 | — — | — |
Avg. interval
4.10s
Std. deviation
0.33
Deceleration
Stride pattern
New personal best!
Fastest interval: 3.63s (H2–H3).
Excellent fatigue resistance: only 9.8% speed loss between the first and second halves (8.8 → 7.94 m/s).
Steady stride pattern.
Lead leg alternation: 1× Left, 9× Right.