Progress against the field
From Rotterdam 2025 to Rotterdam 2026, the field gained 19:43 on Arne Kelfkens.
Over the same races everyone got 3:52 quicker, so 15:51 slower on the clock looks better than it was.
274 days between Rotterdam 2025 and Utrecht 2025 is the longest gap compared here, and the second race was 5:15 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 Individual Pro · Men, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Rotterdam15 Apr 2026Individual Pro · Men1:34:00268/348Beat 23%
↑ 138 days after Utrecht 2025 14:28 worse than the field Why ↓Close ↑
11:03 slower on the clock in a race that was 3:25 faster for everyone: 14:28 lost to the field.
The fieldCompare these two →3:25 faster This athlete11:03 slower -
Amsterdam21 Jan 2026Doubles Pro · Men1:12:01216/298Beat 28%
↑ 468 days after Amsterdam 2024, with Edwin Van Der Weele 6:13 worse than the field Why ↓Close ↑
1:28 slower on the clock in a race that was 4:45 faster for everyone: 6:13 lost to the field.
The fieldCompare these two →4:45 faster This pair1:28 slower -
Utrecht28 Nov 2025Individual Pro · Men1:22:5744/102Beat 57%
↑ 274 days after Rotterdam 2025 5:15 worse than the field Why ↓Close ↑
5:15 behind the field: 4:48 slower on the clock, against 0:27 faster for everyone.
The fieldCompare these two →0:27 faster This athlete4:48 slower -
Rotterdam27 Feb 2025Individual Pro · Men1:18:09 PB46/196Beat 77%
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Amsterdam10 Oct 2024Doubles Pro · Men1:10:33 PB60/144Beat 58%
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Amsterdam4 Nov 2023Doubles Open · Men1:11:19 PB112/411Beat 73%