On 5 July 2026, William Alowanou (France) ran their 400 metres hurdles in 53.45 seconds at Montgeron (Regional Championships U20). It's also their new personal best.
| 18.86 |
| 8.20 |
13 R |
R |
| H5 | 4.63(+0.36) | 23.49 | 7.56 | 14 L | L |
| H6 | 4.58(-0.05) | 28.07 | 7.64 | 14 R | R |
| H7 | 4.78(+0.20) | 32.85 | 7.32 | 14 L | L |
| H8 | 4.85(+0.07) | 37.70 | 7.22 | 14 R | R |
| H9 | 5.10(+0.25) | 42.80 | 6.86 | 15 R | R |
| H10 | 5.18(+0.08) | 47.98 | 6.76 | 15 R | R |
| Finish | 5.47 | 53.45 | 7.31 | — — | — |
Avg. interval
4.62s
Std. deviation
0.38
Deceleration
Stride pattern
New personal best!
Fastest interval: 4.08s (H2–H3).
Excellent fatigue resistance: only 8.9% speed loss between the first and second halves (7.88 → 7.18 m/s).
Stutter on H10.
Lead leg alternation: 2× Left, 8× Right.