On 16 August 1995, Tonja Buford (United States) ran their 400 metres hurdles in 52.90 seconds at Zürich (Zürich Meeting). It's also their new personal best.
On 4h/world, this time earns Tonja a Top 8% World ranking.
| 18.99 |
| 8.18 |
15 L |
L |
| H5 | 4.38(+0.10) | 23.37 | 7.99 | 15 L | L |
| H6 | 4.44(+0.06) | 27.81 | 7.88 | 15 L | L |
| H7 | 4.69(+0.25) | 32.50 | 7.46 | — — | — |
| H8 | 4.82(+0.13) | 37.32 | 7.26 | — R | R |
| H9 | 4.87(+0.05) | 42.19 | 7.19 | 16 L | L |
| H10 | 5.07(+0.20) | 47.26 | 6.90 | 17 — | — |
| Finish | 5.64 | 52.90 | 7.09 | — — | — |
Avg. interval
4.53s
Std. deviation
0.33
Deceleration
Stride pattern
New personal best!
Fastest interval: 4.03s (H2–H3).
Excellent fatigue resistance: only 8% speed loss between the first and second halves (7.92 → 7.28 m/s).
Lead leg alternation: 7× Left, 1× Right.