On 18 July 2026, Lazare Defour (France) ran their 400 metres hurdles in 51.91 seconds at Paris, Charléty (France Championships U23).
| 18.67 |
| 8.33 |
14 R |
R |
| H5 | 4.30(+0.10) | 22.97 | 8.14 | 14 L | L |
| H6 | 4.45(+0.15) | 27.42 | 7.87 | 14 R | R |
| H7 | 4.56(+0.11) | 31.98 | 7.68 | 15 R | R |
| H8 | 4.66(+0.10) | 36.64 | 7.51 | 15 R | R |
| H9 | 4.85(+0.19) | 41.49 | 7.22 | 15 R | R |
| H10 | 4.96(+0.11) | 46.45 | 7.06 | 15 R | R |
| Finish | 5.46 | 51.91 | 7.33 | — — | — |
Avg. interval
4.47s
Std. deviation
0.30
Deceleration
Stride pattern
Very consistent intervals (σ=0.3s).
Fastest interval: 4s (H2–H3).
Excellent fatigue resistance: only 7.8% speed loss between the first and second halves (8.05 → 7.43 m/s).
Steady stride pattern.
Lead leg alternation: 3× Left, 7× Right.