Progress against the field
Between Maastricht 2025 and Rotterdam 2026, Isabella Weijers and Joey Butter lost 1:35 to the field.
Over the same races everyone got 6:13 quicker, so 4:38 faster on the clock looks better than it was.
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
4 races · 4 events
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Rotterdam15 Apr 2026Doubles Open · Mixed1:39:23 PB914/1047Beat 13%
↑ 208 days after Maastricht 2025, with Joey Butter 1:35 worse than the field Faster on the clock, behind the field Why ↓Close ↑
4:38 faster on the clock, yet the race was 6:13 faster for everyone, so 1:35 was lost on the field.
The fieldCompare these two →6:13 faster This pair4:38 faster -
Mechelen26 Mar 2026Doubles Open · Mixed1:41:19904/962Beat 6%
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Maastricht19 Sep 2025Doubles Open · Mixed1:44:01603/658Beat 8%
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Amsterdam10 Oct 2024Doubles Open · Women1:46:23 PB603/657Beat 8%