On 18 August 2016, Ashley Spencer (United States) ran their 400 metres hurdles in 53.72 seconds at Rio de Janeiro (Olympic Games).
On 4h/world, this time earns Ashley a Top 15% World ranking.
| 19.68 |
| 8.08 |
14 R |
R |
| H5 | 4.58(+0.25) | 24.26 | 7.64 | 15 R | R |
| H6 | 4.58(0.00) | 28.84 | 7.64 | 15 R | R |
| H7 | 4.66(+0.08) | 33.50 | 7.51 | 15 R | R |
| H8 | 4.73(+0.07) | 38.23 | 7.40 | 15 R | R |
| H9 | 4.84(+0.11) | 43.07 | 7.23 | 15 R | R |
| H10 | 4.95(+0.11) | 48.02 | 7.07 | 15 R | R |
| Finish | 5.70 | 53.72 | 7.02 | — — | — |
Avg. interval
4.60s
Std. deviation
0.21
Deceleration
Stride pattern
Very consistent intervals (σ=0.21s).
Fastest interval: 4.33s (H2–H3).
Very low deceleration (4.3%: 7.63 → 7.3 m/s), a likely sign of an over-managed first half.
Steady stride pattern.
Lead leg alternation: 3× Left, 7× Right.
Max speed
8.08m/s
Avg speed
7.45m/s
Std. deviation
0.21s