Progress against the field
From Amsterdam 2023 to Heerenveen 2026, the field gained 6:40 on Jan De Leeuw.
Over the same races everyone got 19:18 quicker, so 12:38 faster on the clock looks better than it was.
344 days between Amsterdam 2024 and Maastricht 2025 is the longest gap compared here, and the second race was 3:13 behind the field.
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
7 races · 7 events
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Heerenveen14 May 2026Individual Open · Men1:31:20 PB667/966Beat 31%
↑ 113 days after Amsterdam 2026 0:01 worse than the field Why ↓Close ↑
Moved with the field: 2:32 faster on the clock, against 2:33 faster for everyone.
The fieldCompare these two →2:33 faster This athlete2:32 faster -
Amsterdam21 Jan 2026Individual Open · Men1:33:521226/1620Beat 24%
↑ 124 days after Maastricht 2025 3:19 worse than the field Faster on the clock, behind the field Why ↓Close ↑
4:40 faster on the clock, yet the race was 7:59 faster for everyone, so 3:19 was lost on the field.
The fieldCompare these two →7:59 faster This athlete4:40 faster -
Maastricht19 Sep 2025Individual Open · Men1:38:32940/1352Beat 31%
↑ 344 days after Amsterdam 2024 3:13 worse than the field Why ↓Close ↑
3:44 slower on the clock in a race that was 0:31 slower for everyone: 3:13 lost to the field.
The fieldCompare these two →0:31 slower This athlete3:44 slower -
Heerenveen9 May 2025Doubles Pro · Men1:18:04 PB70/92Beat 24%
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Amsterdam10 Oct 2024Individual Open · Men1:34:481113/1539Beat 28%
↑ 187 days after Rotterdam 2024 3:22 better than the field Why ↓Close ↑
10:09 faster on the clock, and the race was 6:47 faster for everyone, so 3:22 of it was this athlete.
The fieldCompare these two →6:47 faster This athlete10:09 faster -
Rotterdam6 Apr 2024Individual Open · Men1:44:571122/1380Beat 19%
↑ 154 days after Amsterdam 2023 3:29 worse than the field Why ↓Close ↑
0:59 slower on the clock in a race that was 2:30 faster for everyone: 3:29 lost to the field.
The fieldCompare these two →2:30 faster This athlete0:59 slower -
Amsterdam4 Nov 2023Individual Open · Men1:43:58880/1079Beat 18%