Progress against the field
From Rotterdam 2024 to Rotterdam 2025, the field gained 1:05 on Reinier De Groot and Derkjan Marsman.
The clock says 4:55 faster, but the races themselves got 6:00 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.
Every race
5 races · 5 events
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Heerenveen14 May 2026Doubles Open · Men1:09:25 PB137/434Beat 68%
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Utrecht28 Nov 2025Individual Open · Men1:24:19 PB219/575Beat 62%
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Rotterdam27 Feb 2025Doubles Open · Men1:16:29189/335Beat 44%
↑ 140 days after Amsterdam 2024, with Derkjan Marsman 1:53 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:38 faster on the clock looks better than it was: the race was 2:31 faster for everyone, which leaves this 1:53 behind the field.
The fieldCompare these two →2:31 faster This pair0:38 faster -
Amsterdam10 Oct 2024Doubles Open · Men1:17:07477/855Beat 44%
↑ 187 days after Rotterdam 2024, with Derkjan Marsman 0:48 better than the field Why ↓Close ↑
4:17 faster on the clock, and the race was 3:29 faster for everyone, so 0:48 of it was this pair.
The fieldCompare these two →3:29 faster This pair4:17 faster -
Rotterdam6 Apr 2024Doubles Open · Men1:21:24485/722Beat 33%