On 21 June 2026, Alastair Chalmers (United Kingdom) ran their 400 metres hurdles in 49.05 seconds at Birmingham (United Kingdom Championships).
On 4h/world, this time earns Alastair a Top 24% Europe ranking.
| 17.20 |
| 9.28 |
13 L |
L |
| H5 | 3.89(+0.12) | 21.09 | 9.00 | 13 L | L |
| H6 | 4.13(+0.24) | 25.22 | 8.47 | 13 L | L |
| H7 | 4.47(+0.34) | 29.69 | 7.83 | 14 R | R |
| H8 | 4.53(+0.06) | 34.22 | 7.73 | 14 L | L |
| H9 | 4.76(+0.23) | 38.98 | 7.35 | 15 L | L |
| H10 | 4.70(-0.06) | 43.68 | 7.45 | 15 L | L |
| Finish | 5.37 | 49.05 | 7.45 | — — | — |
Avg. interval
4.19s
Std. deviation
0.40
Deceleration
Stride pattern
Fastest interval: 3.73s (H2–H3).
Deceleration of 12.3% between the first half (8.77 m/s) and the second half (7.69 m/s).
Steady stride pattern.
Lead leg alternation: 9× Left, 1× Right.
All-time fastest sectors
All-time slowest sectors