Progress against the field
Between Heerenveen 2025 and Maastricht 2026, Jeroen Effing pulled 4:02 ahead of the field.
Over the same races everyone got 5:54 quicker, so 9:56 faster on the clock looks better than it was.
241 days between Amsterdam 2026 and Maastricht 2026 is the longest gap compared here, and the second race was 4:16 behind 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 · 7 events
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Maastricht19 Sep 2026Relay · Mixed1:06:0011/69Beat 84%
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Maastricht19 Sep 2026Individual Open · Men1:24:45241/546Beat 56%
↑ 241 days after Amsterdam 2026 4:16 worse than the field Why ↓Close ↑
3:36 slower on the clock in a race that was 0:40 faster for everyone: 4:16 lost to the field.
The fieldCompare these two →0:40 faster This athlete3:36 slower -
Rotterdam15 Apr 2026Doubles Open · Mixed1:08:09 PB83/1047Beat 92%
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Mechelen26 Mar 2026Doubles Open · Mixed1:14:48140/424Beat 67%
↑ 64 days after Amsterdam 2026, with Tanja Wolters 0:00 better than the field Why ↓Close ↑
Moved with the field: 1:02 faster on the clock, against 1:02 faster for everyone.
The fieldCompare these two →1:02 faster This pair1:02 faster -
Amsterdam21 Jan 2026Doubles Open · Mixed1:15:50458/1206Beat 62%
↑ 124 days after Maastricht 2025, with Tanja Wolters 0:51 better than the field Why ↓Close ↑
0:51 better than the field: 7:41 faster on the clock, against 6:50 faster for everyone.
The fieldCompare these two →6:50 faster This pair7:41 faster -
Amsterdam21 Jan 2026Individual Open · Men1:21:09 PB198/570Beat 65%
↑ 54 days after Utrecht 2025 3:19 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:48 faster on the clock looks better than it was: the race was 5:07 faster for everyone, which leaves this 3:19 behind the field.
The fieldCompare these two →5:07 faster This athlete1:48 faster -
Utrecht28 Nov 2025Individual Open · Men1:22:57192/575Beat 67%
↑ 203 days after Heerenveen 2025 11:37 better than the field Why ↓Close ↑
11:44 faster on the clock, and the race was 0:07 faster for everyone, so 11:37 of it was this athlete.
The fieldCompare these two →0:07 faster This athlete11:44 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:23:31169/364Beat 54%
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Heerenveen9 May 2025Individual Open · Men1:34:41224/325Beat 31%