Progress against the field
Between Amsterdam 2023 and Rotterdam 2026, Wouter ter Horst lost 2:27 to the field.
Over the same races everyone got 17:20 quicker, so 14:53 faster on the clock looks better than it was.
The longest gap between two races compared here, 375 days between Belgium 2025 and Rotterdam 2026, cost 9:22 on 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 Open · Men, the one raced most; every comparison is in the list below.
Every race
9 races · 9 events
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Heerenveen14 May 2026Individual Pro · Men1:28:47 PB339/454Beat 25%
↑ 441 days after Rotterdam 2025 4:00 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:08 faster on the clock looks better than it was: the race was 6:08 faster for everyone, which leaves this 4:00 behind the field.
The fieldCompare these two →6:08 faster This athlete2:08 faster -
Rotterdam15 Apr 2026Individual Open · Men1:18:55342/1192Beat 71%
↑ 375 days after Belgium 2025 9:22 worse than the field Why ↓Close ↑
9:22 behind the field: 2:55 slower on the clock, against 6:27 faster for everyone.
The fieldCompare these two →6:27 faster This athlete2:55 slower -
EMEA London Olympia24 Mar 2026Doubles Open · Men1:02:00 PB195/455Beat 57%
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Utrecht28 Nov 2025Doubles Open · Men1:04:1997/879Beat 89%
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Belgium5 Apr 2025Individual Open · Men1:16:00 PB372/1638Beat 77%
↑ 177 days after Amsterdam 2024 1:52 better than the field Why ↓Close ↑
1:52 better than the field: 3:28 faster on the clock, against 1:36 faster for everyone.
The fieldCompare these two →1:36 faster This athlete3:28 faster -
Rotterdam27 Feb 2025Individual Pro · Men1:30:5572/99Beat 27%
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Amsterdam10 Oct 2024Individual Open · Men1:19:28472/1539Beat 69%
↑ 187 days after Rotterdam 2024 8:11 better than the field Why ↓Close ↑
8:11 better than the field: 14:58 faster on the clock, against 6:47 faster for everyone.
The fieldCompare these two →6:47 faster This athlete14:58 faster -
Rotterdam6 Apr 2024Individual Open · Men1:34:26813/1380Beat 41%
↑ 154 days after Amsterdam 2023 3:08 worse than the field Why ↓Close ↑
3:08 behind the field: 0:38 slower on the clock, against 2:30 faster for everyone.
The fieldCompare these two →2:30 faster This athlete0:38 slower -
Amsterdam4 Nov 2023Individual Open · Men1:33:48662/1079Beat 39%