Progress against the field
Between Rotterdam 2024 and Utrecht 2025, Bojanne Westerman and Wiebe Kuipers pulled 4:50 ahead of the field.
Over the same races everyone got 5:42 quicker, so 10:32 faster on the clock looks better than it was.
The biggest step was Rotterdam 2024 → Amsterdam 2024: 3:52 on the field 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. The summary above covers Doubles Open · Mixed, with Wiebe Kuipers, the one raced most; every comparison is in the list below.
Every race
9 races · 8 events
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Maastricht19 Sep 2026Doubles Open · Mixed1:04:3333/687Beat 95%
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Barcelona14 May 2026Doubles Pro · Women1:14:22 PB74/200Beat 63%
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Warsaw16 Apr 2026Doubles Open · Mixed1:03:2930/261Beat 89%
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Mechelen26 Mar 2026Individual Open · Women1:23:47 PB164/776Beat 79%
↑ 532 days after Amsterdam 2024 1:55 better than the field Why ↓Close ↑
1:55 better than the field: 4:40 faster on the clock, against 2:45 faster for everyone.
The fieldCompare these two →2:45 faster This athlete4:40 faster -
Amsterdam21 Jan 2026Doubles Open · Women1:10:47 PB60/1030Beat 94%
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Utrecht28 Nov 2025Doubles Open · Mixed1:03:10 PB11/701Beat 98%
↑ 414 days after Amsterdam 2024, with Wiebe Kuipers 0:58 better than the field Why ↓Close ↑
0:58 better than the field: 4:39 faster on the clock, against 3:41 faster for everyone.
The fieldCompare these two →3:41 faster This pair4:39 faster -
Amsterdam10 Oct 2024Doubles Open · Mixed1:07:4956/618Beat 91%
↑ 187 days after Rotterdam 2024, with Wiebe Kuipers 3:52 better than the field Why ↓Close ↑
5:53 faster on the clock, and the race was 2:01 faster for everyone, so 3:52 of it was this pair.
The fieldCompare these two →2:01 faster This pair5:53 faster -
Amsterdam10 Oct 2024Individual Open · Women1:28:27231/678Beat 66%
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Rotterdam6 Apr 2024Doubles Open · Mixed1:13:4298/534Beat 82%