Progress against the field
Nienke Tjalsma has dropped 3:20 behind the field from Rotterdam 2026 to Maastricht 2026.
The clock says 1:38 slower, but the races themselves got 1:42 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. The summary above covers Individual Open · Women, the one raced most; every comparison is in the list below.
Every race
9 races · 9 events
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Valencia17 Oct 2026Doubles Open · Mixed1:12:0366/302Beat 78%
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Maastricht19 Sep 2026Individual Open · Women1:27:01137/577Beat 76%
↑ 128 days after Heerenveen 2026 4:01 worse than the field Why ↓Close ↑
5:38 slower on the clock in a race that was 1:37 slower for everyone: 4:01 lost to the field.
The fieldCompare these two →1:37 slower This athlete5:38 slower -
Heerenveen14 May 2026Individual Open · Women1:21:23 PB41/205Beat 80%
↑ 29 days after Rotterdam 2026 0:41 better than the field Why ↓Close ↑
0:41 better than the field: 4:00 faster on the clock, against 3:19 faster for everyone.
The fieldCompare these two →3:19 faster This athlete4:00 faster -
Rotterdam15 Apr 2026Individual Open · Women1:25:23165/695Beat 76%
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Amsterdam21 Jan 2026Doubles Open · Mixed1:09:52 PB214/1206Beat 82%
↑ 40 days after Gent 2025, with Erik Ipema 1:46 better than the field Why ↓Close ↑
3:27 faster on the clock, and the race was 1:41 faster for everyone, so 1:46 of it was this pair.
The fieldCompare these two →1:41 faster This pair3:27 faster -
Gent12 Dec 2025Doubles Open · Mixed1:13:19212/863Beat 75%
↑ 84 days after Maastricht 2025, with Erik Ipema 0:01 better than the field Why ↓Close ↑
5:46 faster on the clock, and the race was 5:45 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →5:45 faster This pair5:46 faster -
Utrecht28 Nov 2025Doubles Open · Women1:23:57 PB306/828Beat 63%
↑ 274 days after Rotterdam 2025, with Linda Kappert 2:05 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:39 faster on the clock, yet the race was 2:44 faster for everyone, so 2:05 was lost on the field.
The fieldCompare these two →2:44 faster This pair0:39 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:19:05203/658Beat 69%
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Rotterdam27 Feb 2025Doubles Open · Women1:24:36259/633Beat 59%