Progress against the field
From Rotterdam 2025 to Heerenveen 2026, the field gained 1:41 on Jeroen Slootmaaker.
Over the same races everyone got 8:14 quicker, so 6:33 faster on the clock looks better than it was.
The largest gain on the field came from Rotterdam 2026 → Heerenveen 2026: 6:56 in 29 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
4 races · 4 events
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Heerenveen14 May 2026Individual Open · Men1:29:43 PB619/966Beat 36%
↑ 29 days after Rotterdam 2026 6:56 better than the field Why ↓Close ↑
6:56 better than the field: 8:43 faster on the clock, against 1:47 faster for everyone.
The fieldCompare these two →1:47 faster This athlete8:43 faster -
Rotterdam15 Apr 2026Individual Open · Men1:38:26914/1192Beat 23%
↑ 124 days after Gent 2025 8:55 worse than the field Why ↓Close ↑
8:55 behind the field: 4:57 slower on the clock, against 3:58 faster for everyone.
The fieldCompare these two →3:58 faster This athlete4:57 slower -
Gent12 Dec 2025Individual Open · Men1:33:291046/1428Beat 27%
↑ 288 days after Rotterdam 2025 0:18 better than the field Why ↓Close ↑
0:18 better than the field: 2:47 faster on the clock, against 2:29 faster for everyone.
The fieldCompare these two →2:29 faster This athlete2:47 faster -
Rotterdam27 Feb 2025Individual Open · Men1:36:16953/1283Beat 26%