On 18 August 2009, Kerron Clement (United States) ran their 400 metres hurdles in 47.91 seconds at Berlin (World Championships).
On 4h/world, this time earns Kerron a Top 17% World ranking.
| 17.15 |
| 9.14 |
13 R |
R |
| H5 | 3.94(+0.11) | 21.09 | 8.88 | 13 R | R |
| H6 | 4.17(+0.23) | 25.26 | 8.39 | 13 R | R |
| H7 | 4.23(+0.06) | 29.49 | 8.27 | 13 R | R |
| H8 | 4.36(+0.13) | 33.85 | 8.03 | 13 R | R |
| H9 | 4.50(+0.14) | 38.35 | 7.78 | 13 R | R |
| H10 | 4.55(+0.05) | 42.90 | 7.69 | 13 R | R |
| Finish | 5.01 | 47.91 | 7.98 | — — | — |
Avg. interval
4.11s
Std. deviation
0.31
Deceleration
Stride pattern
Fastest interval: 3.68s (H2–H3).
Excellent fatigue resistance: only 8.6% speed loss between the first and second halves (8.77 → 8.02 m/s).
Steady stride pattern.
All-time fastest sectors
All-time slowest sectors
Max speed
9.51m/s
Avg speed
8.35m/s
Std. deviation
0.31s