Progress against the field
Arjo Boerman and Jan Lassooij have gained 6:49 on the field from Heerenveen 2025 to Amsterdam 2026.
The clock says 11:40 faster, but the races themselves got 4:51 quicker for everyone.
203 days between Heerenveen 2025 and Utrecht 2025 is the longest gap compared here, and the second race was 6:50 better than 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 Doubles Open · Men, with Jan Lassooij, the one raced most; every comparison is in the list below.
Every race
5 races · 5 events
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Heerenveen14 May 2026Individual Open · Men1:12:40 PB92/490Beat 81%
↑ 153 days after Gent 2025 1:03 better than the field Why ↓Close ↑
5:38 faster on the clock, and the race was 4:35 faster for everyone, so 1:03 of it was this athlete.
The fieldCompare these two →4:35 faster This athlete5:38 faster -
Amsterdam21 Jan 2026Doubles Open · Men1:11:31 PB461/994Beat 54%
↑ 54 days after Utrecht 2025, with Jan Lassooij 0:01 worse than the field Why ↓Close ↑
Moved with the field: 3:29 faster on the clock, against 3:30 faster for everyone.
The fieldCompare these two →3:30 faster This pair3:29 faster -
Gent12 Dec 2025Individual Open · Men1:18:18448/1428Beat 69%
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Utrecht28 Nov 2025Doubles Open · Men1:15:00425/879Beat 52%
↑ 203 days after Heerenveen 2025, with Jan Lassooij 6:50 better than the field Why ↓Close ↑
6:50 better than the field: 8:11 faster on the clock, against 1:21 faster for everyone.
The fieldCompare these two →1:21 faster This pair8:11 faster -
Heerenveen9 May 2025Doubles Open · Men1:23:11238/309Beat 23%