Progress against the field
From Utrecht 2025 to Rotterdam 2026, Joëlle Duijndam and Amber Boer have moved with the field: what changed on the clock changed for everyone.
The clock says 4:08 faster, but the races themselves got 4:19 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 Doubles Open · Women, with Amber Boer, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Heerenveen14 May 2026Doubles Open · Women1:08:01 PB23/737Beat 97%
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Rotterdam15 Apr 2026Doubles Open · Women1:11:5256/936Beat 94%
↑ 20 days after Mechelen 2026, with Amber Boer 0:22 better than the field Why ↓Close ↑
0:22 better than the field: 1:11 faster on the clock, against 0:49 faster for everyone.
The fieldCompare these two →0:49 faster This pair1:11 faster -
Mechelen26 Mar 2026Doubles Open · Women1:13:0378/1017Beat 92%
↑ 118 days after Utrecht 2025, with Amber Boer 0:33 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:57 faster on the clock, yet the race was 3:30 faster for everyone, so 0:33 was lost on the field.
The fieldCompare these two →3:30 faster This pair2:57 faster -
Amsterdam21 Jan 2026Individual Open · Women1:17:42 PB125/1122Beat 89%
↑ 124 days after Maastricht 2025 3:38 better than the field Why ↓Close ↑
3:38 better than the field: 10:33 faster on the clock, against 6:55 faster for everyone.
The fieldCompare these two →6:55 faster This athlete10:33 faster -
Utrecht28 Nov 2025Doubles Open · Women1:16:0087/828Beat 90%
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Maastricht19 Sep 2025Individual Open · Women1:28:15191/590Beat 68%