On 18 August 2009, David Green (United Kingdom) ran their 400 metres hurdles in 48.68 seconds at Berlin (World Championships).
On 4h/world, this time earns David a Top 30% World ranking.
| 17.65 |
| 8.88 |
14 L |
L |
| H5 | 4.11(+0.17) | 21.76 | 8.52 | 14 R | R |
| H6 | 4.17(+0.06) | 25.93 | 8.39 | 14 L | L |
| H7 | 4.26(+0.09) | 30.19 | 8.22 | 15 L | L |
| H8 | 4.33(+0.07) | 34.52 | 8.08 | 15 L | L |
| H9 | 4.40(+0.07) | 38.92 | 7.95 | 15 L | L |
| H10 | 4.54(+0.14) | 43.46 | 7.71 | 15 L | L |
| Finish | 5.22 | 48.68 | 7.66 | — — | — |
Avg. interval
4.15s
Std. deviation
0.24
Deceleration
Stride pattern
Very consistent intervals (σ=0.24s).
Fastest interval: 3.79s (H2–H3).
Excellent fatigue resistance: only 6.1% speed loss between the first and second halves (8.5 → 7.99 m/s).
Steady stride pattern.
Lead leg alternation: 7× Left, 3× Right.
All-time fastest sectors
All-time slowest sectors
Max speed
9.23m/s
Avg speed
8.22m/s
Std. deviation
0.24s