Progress against the field
From Rotterdam 2024 to Utrecht 2025, Judith Hordijk and Tanja Berntsen got 6:58 faster than the field.
Over the same races everyone got 7:17 quicker, so 14:15 faster on the clock looks better than it was.
The largest gain on the field came from Rotterdam 2024 → Amsterdam 2024: 8:44 in 187 days.
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
6 races · 6 events
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Heerenveen14 May 2026Doubles Open · Women1:12:41 PB56/737Beat 92%
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Utrecht28 Nov 2025Doubles Open · Women1:20:26206/828Beat 75%
↑ 203 days after Heerenveen 2025, with Tanja Berntsen 1:55 worse than the field Why ↓Close ↑
1:55 behind the field: 0:43 slower on the clock, against 1:12 faster for everyone.
The fieldCompare these two →1:12 faster This pair0:43 slower -
Heerenveen9 May 2025Doubles Open · Women1:19:4396/566Beat 83%
↑ 211 days after Amsterdam 2024, with Tanja Berntsen 0:09 better than the field Why ↓Close ↑
3:06 faster on the clock, and the race was 2:57 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →2:57 faster This pair3:06 faster -
Amsterdam10 Oct 2024Doubles Open · Women1:22:49223/657Beat 66%
↑ 187 days after Rotterdam 2024, with Tanja Berntsen 8:44 better than the field Why ↓Close ↑
11:52 faster on the clock, and the race was 3:08 faster for everyone, so 8:44 of it was this pair.
The fieldCompare these two →3:08 faster This pair11:52 faster -
Malaga13 Apr 2024Doubles Open · Women1:20:4798/295Beat 67%
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Rotterdam6 Apr 2024Doubles Open · Women1:34:41367/564Beat 35%