Progress against the field
Between Amsterdam 2022 and Heerenveen 2025, Durk Walstra lost 3:07 to the field.
The clock says 5:30 faster, but the races themselves got 8:37 quicker for everyone.
The longest gap between two races compared here, 518 days between Amsterdam 2023 and Belgium 2025, still ended 12:46 ahead of 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.
Every race
5 races · 5 events
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Amsterdam21 Jan 2026Doubles Open · Men1:10:50 PB430/994Beat 57%
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Heerenveen9 May 2025Individual Open · Men1:26:39 PB664/1217Beat 45%
↑ 34 days after Belgium 2025 1:01 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:27 faster on the clock looks better than it was: the race was 2:28 faster for everyone, which leaves this 1:01 behind the field.
The fieldCompare these two →2:28 faster This athlete1:27 faster -
Belgium5 Apr 2025Individual Open · Men1:28:06901/1638Beat 45%
↑ 518 days after Amsterdam 2023 12:46 better than the field Why ↓Close ↑
16:39 faster on the clock, and the race was 3:53 faster for everyone, so 12:46 of it was this athlete.
The fieldCompare these two →3:53 faster This athlete16:39 faster -
Amsterdam4 Nov 2023Individual Open · Men1:44:45894/1079Beat 17%
↑ 378 days after Amsterdam 2022 14:52 worse than the field Why ↓Close ↑
14:52 behind the field: 12:36 slower on the clock, against 2:16 faster for everyone.
The fieldCompare these two →2:16 faster This athlete12:36 slower -
Amsterdam22 Oct 2022Individual Open · Men1:32:09338/561Beat 40%