On 18 July 2026, David Friederich (Luxembourg) ran their 400 metres hurdles in 52.42 seconds at Paris, Charléty (France Championships U23).
| 18.96 |
| 8.08 |
14 R |
R |
| H5 | 4.26(-0.07) | 23.22 | 8.22 | 14 L | L |
| H6 | 4.55(+0.29) | 27.77 | 7.69 | 15 L | L |
| H7 | 4.55(0.00) | 32.32 | 7.69 | 15 L | L |
| H8 | 4.60(+0.05) | 36.92 | 7.61 | 15 L | L |
| H9 | 4.90(+0.30) | 41.82 | 7.14 | 15 L | L |
| H10 | 5.01(+0.11) | 46.83 | 6.99 | 15 L | L |
| Finish | 5.59 | 52.42 | 7.16 | — — | — |
Avg. interval
4.50s
Std. deviation
0.30
Deceleration
Stride pattern
Very consistent intervals (σ=0.3s).
Fastest interval: 4.1s (H3–H4).
Excellent fatigue resistance: only 7.6% speed loss between the first and second halves (7.97 → 7.36 m/s).
Steady stride pattern.
Lead leg alternation: 8× Left, 2× Right.