Progress against the field
From Heerenveen 2025 to Heerenveen 2026, Willem-Jan Hessels got 1:22 faster than the field.
Over the same races everyone got 9:00 quicker, so 10:22 faster on the clock looks better than it was.
The biggest step was Utrecht 2025 → Rotterdam 2026: 7:12 on the field in 138 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 · Men1:15:13 PB238/966Beat 75%
↑ 29 days after Rotterdam 2026 0:51 better than the field Why ↓Close ↑
2:38 faster on the clock, and the race was 1:47 faster for everyone, so 0:51 of it was this athlete.
The fieldCompare these two →1:47 faster This athlete2:38 faster -
Rotterdam15 Apr 2026Individual Open · Men1:17:51314/1192Beat 74%
↑ 138 days after Utrecht 2025 7:12 better than the field Why ↓Close ↑
7:12 better than the field: 12:31 faster on the clock, against 5:19 faster for everyone.
The fieldCompare these two →5:19 faster This athlete12:31 faster -
Utrecht28 Nov 2025Individual Open · Men1:30:22732/1337Beat 45%
↑ 70 days after Maastricht 2025 5:18 worse than the field Why ↓Close ↑
1:42 slower on the clock in a race that was 3:36 faster for everyone: 5:18 lost to the field.
The fieldCompare these two →3:36 faster This athlete1:42 slower -
Maastricht19 Sep 2025Individual Open · Men1:28:40327/584Beat 44%
↑ 133 days after Heerenveen 2025 1:23 worse than the field Why ↓Close ↑
1:23 behind the field: 3:05 slower on the clock, against 1:42 slower for everyone.
The fieldCompare these two →1:42 slower This athlete3:05 slower -
Heerenveen9 May 2025Individual Open · Men1:25:35624/1217Beat 49%