On 19 September 2025, Emma Zapletalova (Slovakia) ran their 400 metres hurdles in 53.00 seconds at Tokyo (World Championships).
On 4h/world, this time earns Emma a Top 10% World ranking.
| 19.04 |
| 8.33 |
15 R |
R |
| H5 | 4.32(+0.12) | 23.36 | 8.10 | 15 R | R |
| H6 | 4.52(+0.20) | 27.88 | 7.74 | 15 R | R |
| H7 | 4.64(+0.12) | 32.52 | 7.54 | 15 R | R |
| H8 | 4.84(+0.20) | 37.36 | 7.23 | 16 L | L |
| H9 | 4.92(+0.08) | 42.28 | 7.11 | 16 R | R |
| H10 | 5.12(+0.20) | 47.40 | 6.84 | 16 L | L |
| Finish | 5.60 | 53.00 | 7.14 | — — | — |
Avg. interval
4.54s
Std. deviation
0.34
Deceleration
Stride pattern
Fastest interval: 4.12s (H2–H3).
Excellent fatigue resistance: only 8.4% speed loss between the first and second halves (7.92 → 7.25 m/s).
Steady stride pattern.
Lead leg alternation: 2× Left, 8× Right.
All-time slowest sectors