On 4 June 2026, Emma Zapletalova (Slovakia) ran their 400 metres hurdles in 52.58 seconds at Rome (Diamond League).
On 4h/world, this time earns Emma a Top 5% World ranking.
| 18.71 |
| 8.41 |
15 R |
R |
| H5 | 4.26(+0.10) | 22.97 | 8.22 | 15 R | R |
| H6 | 4.42(+0.16) | 27.39 | 7.92 | 15 R | R |
| H7 | 4.58(+0.16) | 31.97 | 7.64 | 15 R | R |
| H8 | 4.61(+0.03) | 36.58 | 7.59 | 15 R | R |
| H9 | 4.83(+0.22) | 41.41 | 7.25 | 15 R | R |
| H10 | 5.14(+0.31) | 46.55 | 6.81 | 16 L | L |
| Finish | 6.03 | 52.58 | 6.63 | — — | — |
Avg. interval
4.46s
Std. deviation
0.35
Deceleration
Stride pattern
Fastest interval: 4.06s (H2–H3).
Excellent fatigue resistance: only 9.8% speed loss between the first and second halves (8.05 → 7.26 m/s).
Steady stride pattern.
Lead leg alternation: 1× Left, 9× Right.