On 18 August 2009, Bershawn Jackson (United States) ran their 400 metres hurdles in 48.23 seconds at Berlin (World Championships).
On 4h/world, this time earns Bershawn a Top 27% World ranking.
| 17.71 |
| 8.50 |
14 R |
R |
| H5 | 4.16(+0.04) | 21.87 | 8.41 | 14 L | L |
| H6 | 4.14(-0.02) | 26.01 | 8.45 | 15 L | L |
| H7 | 4.16(+0.02) | 30.17 | 8.41 | 15 L | L |
| H8 | 4.26(+0.10) | 34.43 | 8.22 | 15 L | L |
| H9 | 4.36(+0.10) | 38.79 | 8.03 | 15 L | L |
| H10 | 4.43(+0.07) | 43.22 | 7.90 | 15 L | L |
| Finish | 5.01 | 48.23 | 7.98 | — — | — |
Avg. interval
4.16s
Std. deviation
0.17
Deceleration
Stride pattern
Very consistent intervals (σ=0.17s).
Fastest interval: 3.87s (H2–H3).
Very low deceleration (3.6%: 8.46 → 8.16 m/s), a likely sign of an over-managed first half.
Steady stride pattern.
Lead leg alternation: 8× Left, 2× Right.
Max speed
9.04m/s
Avg speed
8.29m/s
Std. deviation
0.17s