On 25 July 2026, Mario Santin (Spain) ran their 400 metres hurdles in 51.76 seconds at Málaga (Spain Championships).
| 18.52 |
| 8.33 |
14 R |
R |
| H5 | 4.32(+0.12) | 22.84 | 8.10 | 14 L | L |
| H6 | 4.56(+0.24) | 27.40 | 7.68 | 15 L | L |
| H7 | 4.72(+0.16) | 32.12 | 7.42 | 15 L | L |
| H8 | 4.64(-0.08) | 36.76 | 7.54 | 15 L | L |
| H9 | 4.80(+0.16) | 41.56 | 7.29 | 15 L | L |
| H10 | 4.76(-0.04) | 46.32 | 7.35 | 15 L | L |
| Finish | 5.44 | 51.76 | 7.35 | — — | — |
Avg. interval
4.46s
Std. deviation
0.28
Deceleration
Stride pattern
Very consistent intervals (σ=0.28s).
Fastest interval: 4s (H2–H3).
Excellent fatigue resistance: only 8.2% speed loss between the first and second halves (8.1 → 7.43 m/s).
Steady stride pattern.
Lead leg alternation: 8× Left, 2× Right.