Progress against the field
From Birmingham 2025 to Birmingham 2026, Jennifer Groome got 6:56 faster than the field.
Over the same races everyone got 5:53 quicker, so 12:49 faster on the clock looks better than it was.
The longest gap between two races compared here, 189 days between Birmingham 2025 and Cardiff 2026, still ended 6:51 ahead of the field.
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
3 races · 3 events
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Birmingham31 Oct 2026Individual Open · Women1:19:20 PB76/547Beat 86%
↑ 185 days after Cardiff 2026 0:05 better than the field Why ↓Close ↑
Moved with the field: 2:48 faster on the clock, against 2:43 faster for everyone.
The fieldCompare these two →2:43 faster This athlete2:48 faster -
Cardiff29 Apr 2026Individual Open · Women1:22:0873/389Beat 81%
↑ 189 days after Birmingham 2025 6:51 better than the field Why ↓Close ↑
6:51 better than the field: 10:01 faster on the clock, against 3:10 faster for everyone.
The fieldCompare these two →3:10 faster This athlete10:01 faster -
Birmingham22 Oct 2025Individual Open · Women1:32:09175/380Beat 54%