Progress against the field
Between Amsterdam 2024 and Amsterdam 2026, Ilse Willemsen lost 2:57 to the field.
The clock says 7:41 faster, but the races themselves got 10:38 quicker for everyone.
204 days between Rotterdam 2025 and Maastricht 2025 is the longest gap compared here, and the second race was 20:01 behind 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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Amsterdam21 Jan 2026Individual Open · Women1:31:54560/1122Beat 50%
↑ 124 days after Maastricht 2025 11:05 better than the field Why ↓Close ↑
18:00 faster on the clock, and the race was 6:55 faster for everyone, so 11:05 of it was this athlete.
The fieldCompare these two →6:55 faster This athlete18:00 faster -
Maastricht19 Sep 2025Individual Open · Women1:49:54262/348Beat 25%
↑ 204 days after Rotterdam 2025 20:01 worse than the field Why ↓Close ↑
19:07 slower on the clock in a race that was 0:54 faster for everyone: 20:01 lost to the field.
The fieldCompare these two →0:54 faster This athlete19:07 slower -
Rotterdam27 Feb 2025Individual Open · Women1:30:47 PB187/506Beat 63%
↑ 140 days after Amsterdam 2024 5:59 better than the field Why ↓Close ↑
5:59 better than the field: 8:48 faster on the clock, against 2:49 faster for everyone.
The fieldCompare these two →2:49 faster This athlete8:48 faster -
Amsterdam10 Oct 2024Individual Open · Women1:39:35257/408Beat 37%