On 21 August 2026, Emma Zapletalova (Slovakia) ran their 400 metres hurdles in 52.41 seconds at Lausanne (Diamond League).
On 4h/world, this time earns Emma a Top 5% World ranking.
| 18.70 |
| 8.54 |
15 R |
R |
| H5 | 4.23(+0.13) | 22.93 | 8.27 | 15 R | R |
| H6 | 4.40(+0.17) | 27.33 | 7.95 | 15 R | R |
| H7 | 4.47(+0.07) | 31.80 | 7.83 | 15 R | R |
| H8 | 4.47(0.00) | 36.27 | 7.83 | 15 R | R |
| H9 | 4.87(+0.40) | 41.14 | 7.19 | 15 R | R |
| H10 | 5.27(+0.40) | 46.41 | 6.64 | 16 L | L |
| Finish | 6.00 | 52.41 | 6.67 | — — | — |
Avg. interval
4.44s
Std. deviation
0.38
Deceleration
Stride pattern
Fastest interval: 4.03s (H2–H3).
Excellent fatigue resistance: only 9.6% speed loss between the first and second halves (8.07 → 7.29 m/s).
Steady stride pattern.
Lead leg alternation: 1× Left, 9× Right.
All-time fastest sectors