Progress against the field
From Maastricht 2024 to Rotterdam 2026, the field gained 4:25 on John de Boer.
Over the same races everyone got 9:31 quicker, so 5:06 faster on the clock looks better than it was.
The longest gap between two races compared here, 475 days between Maastricht 2024 and Heerenveen 2025, still ended 4:49 ahead of 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
6 races · 6 events
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Rotterdam15 Apr 2026Individual Open · Men1:29:37685/1192Beat 43%
↑ 341 days after Heerenveen 2025 9:14 worse than the field Why ↓Close ↑
4:54 slower on the clock in a race that was 4:20 faster for everyone: 9:14 lost to the field.
The fieldCompare these two →4:20 faster This athlete4:54 slower -
Mechelen26 Mar 2026Individual Pro · Men1:41:17443/457Beat 3%
↑ 118 days after Utrecht 2025 7:45 better than the field Why ↓Close ↑
14:39 faster on the clock, and the race was 6:54 faster for everyone, so 7:45 of it was this athlete.
The fieldCompare these two →6:54 faster This athlete14:39 faster -
Utrecht28 Nov 2025Individual Pro · Men1:55:5695/102Beat 7%
↑ 274 days after Rotterdam 2025 16:20 worse than the field Why ↓Close ↑
15:53 slower on the clock in a race that was 0:27 faster for everyone: 16:20 lost to the field.
The fieldCompare these two →0:27 faster This athlete15:53 slower -
Heerenveen9 May 2025Individual Open · Men1:24:43 PB583/1217Beat 52%
↑ 475 days after Maastricht 2024 4:49 better than the field Why ↓Close ↑
10:00 faster on the clock, and the race was 5:11 faster for everyone, so 4:49 of it was this athlete.
The fieldCompare these two →5:11 faster This athlete10:00 faster -
Rotterdam27 Feb 2025Individual Pro · Men1:40:03 PB91/99Beat 8%
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Maastricht20 Jan 2024Individual Open · Men1:34:43550/781Beat 30%