Progress against the field
From Rotterdam 2025 to Heerenveen 2026, the field gained 25:24 on Isa Jansen.
Over the same races everyone got 11:28 quicker, so 13:56 slower on the clock looks better than it was.
341 days between Heerenveen 2025 and Rotterdam 2026 is the longest gap compared here, and the second race was 3:45 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
5 races · 5 events
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Heerenveen14 May 2026Individual Open · Women1:29:12195/608Beat 68%
↑ 29 days after Rotterdam 2026 19:44 worse than the field Why ↓Close ↑
16:25 slower on the clock in a race that was 3:19 faster for everyone: 19:44 lost to the field.
The fieldCompare these two →3:19 faster This athlete16:25 slower -
Rotterdam15 Apr 2026Individual Open · Women1:12:47 PB12/462Beat 97%
↑ 341 days after Heerenveen 2025 3:45 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:02 faster on the clock, yet the race was 5:47 faster for everyone, so 3:45 was lost on the field.
The fieldCompare these two →5:47 faster This athlete2:02 faster -
Amsterdam21 Jan 2026Doubles Open · Women1:27:52 PB628/1030Beat 39%
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Heerenveen9 May 2025Individual Open · Women1:14:4924/571Beat 96%
↑ 71 days after Rotterdam 2025 1:55 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:27 faster on the clock, yet the race was 2:22 faster for everyone, so 1:55 was lost on the field.
The fieldCompare these two →2:22 faster This athlete0:27 faster -
Rotterdam27 Feb 2025Individual Open · Women1:15:168/203Beat 96%