Progress against the field
Between Birmingham 2023 and Birmingham 2024, Chelsey Nicholls lost 1:51 to the field.
The clock says 0:29 faster, but the races themselves got 2:20 quicker for everyone.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown.
Every race
4 races · 4 events
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Birmingham22 Oct 2025Individual Open · Women1:21:23 PB157/829Beat 81%
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Toulouse8 Feb 2025Individual Open · Women1:37:54456/710Beat 36%
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Birmingham25 Oct 2024Individual Open · Women1:49:04452/564Beat 20%
↑ 370 days after Birmingham 2023 1:51 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:29 faster on the clock, yet the race was 2:20 faster for everyone, so 1:51 was lost on the field.
The fieldCompare these two →2:20 faster This athlete0:29 faster -
Birmingham21 Oct 2023Individual Open · Women1:49:33446/532Beat 16%