On 4 July 2021, Shamier Little (United States) ran their 400 metres hurdles in 52.39 seconds at Stockholm (Diamond League). It's also their new personal best.
On 4h/world, this time earns Shamier a Top 4% World ranking.
| 18.95 |
| 8.03 |
15 R |
R |
| H5 | 4.48(+0.12) | 23.43 | 7.81 | 15 R | R |
| H6 | 4.48(0.00) | 27.91 | 7.81 | 15 R | R |
| H7 | 4.56(+0.08) | 32.47 | 7.68 | 15 R | R |
| H8 | 4.60(+0.04) | 37.07 | 7.61 | 15 R | R |
| H9 | 4.84(+0.24) | 41.91 | 7.23 | 16 L | L |
| H10 | 4.96(+0.12) | 46.87 | 7.06 | 16 R | R |
| Finish | 5.52 | 52.39 | 7.25 | — — | — |
Avg. interval
4.50s
Std. deviation
0.27
Deceleration
Stride pattern
New personal best!
Very consistent intervals (σ=0.27s).
Fastest interval: 4.08s (H2–H3).
Excellent fatigue resistance: only 6% speed loss between the first and second halves (7.9 → 7.42 m/s).
Steady stride pattern.
Lead leg alternation: 1× Left, 9× Right.
All-time fastest sectors
Max speed
8.58m/s
Avg speed
7.64m/s
Std. deviation
0.27s