Progress against the field
Between Rotterdam 2025 and Heerenveen 2026, Tim van Klompenburg pulled 1:07 ahead of the field.
Over the same races everyone got 11:19 quicker, so 12:26 faster on the clock looks better than it was.
The largest gain on the field came from Heerenveen 2025 → Maastricht 2025: 5:15 in 133 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.
Every race
5 races · 5 events
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Heerenveen14 May 2026Individual Open · Men1:22:11235/490Beat 52%
↑ 113 days after Amsterdam 2026 2:48 worse than the field Why ↓Close ↑
0:15 slower on the clock in a race that was 2:33 faster for everyone: 2:48 lost to the field.
The fieldCompare these two →2:33 faster This athlete0:15 slower -
Amsterdam21 Jan 2026Individual Open · Men1:21:56 PB207/570Beat 64%
↑ 124 days after Maastricht 2025 0:34 better than the field Why ↓Close ↑
8:33 faster on the clock, and the race was 7:59 faster for everyone, so 0:34 of it was this athlete.
The fieldCompare these two →7:59 faster This athlete8:33 faster -
Maastricht19 Sep 2025Individual Open · Men1:30:29690/1352Beat 49%
↑ 133 days after Heerenveen 2025 5:15 better than the field Why ↓Close ↑
3:33 faster on the clock in a race that was 1:42 slower for everyone: 5:15 better than the field.
The fieldCompare these two →1:42 slower This athlete3:33 faster -
Heerenveen9 May 2025Individual Open · Men1:34:02885/1217Beat 27%
↑ 71 days after Rotterdam 2025 1:54 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:35 faster on the clock, yet the race was 2:29 faster for everyone, so 1:54 was lost on the field.
The fieldCompare these two →2:29 faster This athlete0:35 faster -
Rotterdam27 Feb 2025Individual Open · Men1:34:37919/1283Beat 28%