On 9 July 2026, Diego Mancini (Italy) ran their 400 metres hurdles in 51.78 seconds at Caorle (Italy Championships U20). It's also their new personal best.
| 18.57 |
| 8.37 |
15 L |
L |
| H5 | 4.22(+0.04) | 22.79 | 8.29 | 15 L | L |
| H6 | 4.30(+0.08) | 27.09 | 8.14 | 15 L | L |
| H7 | 4.54(+0.24) | 31.63 | 7.71 | 15 L | L |
| H8 | 4.72(+0.18) | 36.35 | 7.42 | 15 L | L |
| H9 | 4.86(+0.14) | 41.21 | 7.20 | 15 L | L |
| H10 | 4.98(+0.12) | 46.19 | 7.03 | 15 L | L |
| Finish | 5.59 | 51.78 | 7.16 | — — | — |
Avg. interval
4.44s
Std. deviation
0.33
Deceleration
Stride pattern
New personal best!
Fastest interval: 4s (H2–H3).
Excellent fatigue resistance: only 8.6% speed loss between the first and second halves (8.12 → 7.42 m/s).
Stutter on H4.
Lead leg alternation: 9× Left, 1× Right.