Progress against the field
Between London 2025 and London Excel 2025, Serena Jeram lost 3:52 to the field.
The clock says 0:08 slower, but the races themselves got 3:44 quicker for everyone.
The longest gap between two races compared here, 188 days between Cardiff 2025 and London Excel 2025, still ended 2:52 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
4 races · 4 events
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London Olympia24 Mar 2026Doubles Open · Mixed1:06:51 PB22/213Beat 90%
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London Excel4 Dec 2025Individual Open · Women1:17:49245/1542Beat 84%
↑ 188 days after Cardiff 2025 2:52 better than the field Why ↓Close ↑
5:06 faster on the clock, and the race was 2:14 faster for everyone, so 2:52 of it was this athlete.
The fieldCompare these two →2:14 faster This athlete5:06 faster -
Cardiff30 May 2025Individual Open · Women1:22:55110/400Beat 73%
↑ 27 days after London 2025 6:44 worse than the field Why ↓Close ↑
6:44 behind the field: 5:14 slower on the clock, against 1:30 faster for everyone.
The fieldCompare these two →1:30 faster This athlete5:14 slower -
London3 May 2025Individual Open · Women1:17:41 PB210/1368Beat 85%