Progress against the field
Between Gent 2025 and Maastricht 2026, Mathijs Zijlstra pulled 19:29 ahead of the field.
Over the same races everyone got 4:19 quicker, so 23:48 faster on the clock looks better than it was.
The largest gain on the field came from Gent 2025 → Rotterdam 2026: 18:28 in 124 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
9 races · 6 events
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Maastricht19 Sep 2026Individual Open · Men1:08:08 PB87/1119Beat 92%
↑ 128 days after Heerenveen 2026 1:59 better than the field Why ↓Close ↑
The race was 1:26 slower for everyone and the clock still says 0:33 faster: 1:59 gained on the field.
The fieldCompare these two →1:26 slower This athlete0:33 faster -
Heerenveen14 May 2026Individual Open · Men1:08:4197/966Beat 90%
↑ 29 days after Rotterdam 2026 0:58 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:49 faster on the clock, yet the race was 1:47 faster for everyone, so 0:58 was lost on the field.
The fieldCompare these two →1:47 faster This athlete0:49 faster -
Rotterdam15 Apr 2026Doubles Open · Men1:11:34284/674Beat 58%
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Rotterdam15 Apr 2026Doubles Open · Men1:11:0996/310Beat 69%
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Rotterdam15 Apr 2026Individual Open · Men1:09:3051/556Beat 91%
↑ 124 days after Gent 2025 18:28 better than the field Why ↓Close ↑
22:26 faster on the clock, and the race was 3:58 faster for everyone, so 18:28 of it was this athlete.
The fieldCompare these two →3:58 faster This athlete22:26 faster -
Amsterdam21 Jan 2026Doubles Open · Men1:07:08 PB257/994Beat 74%
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Amsterdam21 Jan 2026Individual Pro · Men1:27:10 PB81/107Beat 24%
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Gent12 Dec 2025Individual Open · Men1:31:561009/1428Beat 29%
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Rotterdam27 Feb 2025Doubles Open · Men1:18:33445/733Beat 39%