Progress against the field
Ar Koolen and Tim Kooij have dropped 5:59 behind the field from Amsterdam 2023 to Belgium 2025.
Over the same races everyone got 8:05 quicker, so 2:06 faster on the clock looks better than it was.
364 days between Rotterdam 2024 and Belgium 2025 is the longest gap compared here, and the second race was 3:26 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. The summary above covers Doubles Open · Men, with Tim Kooij, the one raced most; every comparison is in the list below.
Every race
9 races · 9 events
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Mechelen26 Mar 2026Doubles Open · Men57:45 PB17/593Beat 97%
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Utrecht28 Nov 2025Doubles Open · Men1:04:32104/879Beat 88%
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Maastricht19 Sep 2025Individual Open · Men1:11:40 PB52/584Beat 91%
↑ 972 days after Maastricht European Championships 2023 5:40 better than the field Why ↓Close ↑
8:13 faster on the clock, and the race was 2:33 faster for everyone, so 5:40 of it was this athlete.
The fieldCompare these two →2:33 faster This athlete8:13 faster -
Heerenveen9 May 2025Doubles Pro · Men1:01:53 PB20/92Beat 78%
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Belgium5 Apr 2025Doubles Open · Men1:02:4180/898Beat 91%
↑ 364 days after Rotterdam 2024, with Tim Kooij 3:26 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:54 faster on the clock, yet the race was 4:20 faster for everyone, so 3:26 was lost on the field.
The fieldCompare these two →4:20 faster This pair0:54 faster -
Rotterdam27 Feb 2025Doubles Open · Men57:479/733Beat 99%
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Rotterdam6 Apr 2024Doubles Open · Men1:03:3539/722Beat 95%
↑ 154 days after Amsterdam 2023, with Tim Kooij 2:33 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:12 faster on the clock looks better than it was: the race was 3:45 faster for everyone, which leaves this 2:33 behind the field.
The fieldCompare these two →3:45 faster This pair1:12 faster -
Amsterdam4 Nov 2023Doubles Open · Men1:04:4735/411Beat 92%
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Maastricht European Championships21 Jan 2023Individual Open · Men1:19:53258/556Beat 54%