Progress against the field
From Maastricht 2022 to Maastricht European Championships 2023, Berry Polstra got 0:42 faster than the field.
Over the same races everyone got 8:07 quicker, so 8:49 faster on the clock looks better than it was.
The longest gap between two races compared here, 231 days between Maastricht 2022 and Amsterdam 2022, still ended 7:18 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. The summary above covers Individual Open · Men, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Maastricht19 Sep 2025Relay · Men1:24:4836/40Beat 10%
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Heerenveen9 May 2025Doubles Open · Men1:44:28 PB526/529Beat 1%
↑ 398 days after Rotterdam 2024, with Jan Veenstra 0:16 worse than the field Faster on the clock, behind the field Why ↓Close ↑
3:57 faster on the clock, yet the race was 4:13 faster for everyone, so 0:16 was lost on the field.
The fieldCompare these two →4:13 faster This pair3:57 faster -
Rotterdam6 Apr 2024Doubles Open · Men1:48:25714/722Beat 1%
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Maastricht European Championships21 Jan 2023Individual Open · Men1:55:41543/556Beat 2%
↑ 91 days after Amsterdam 2022 6:36 worse than the field Why ↓Close ↑
2:47 slower on the clock in a race that was 3:49 faster for everyone: 6:36 lost to the field.
The fieldCompare these two →3:49 faster This athlete2:47 slower -
Amsterdam22 Oct 2022Individual Open · Men1:52:54 PB521/561Beat 7%
↑ 231 days after Maastricht 2022 7:18 better than the field Why ↓Close ↑
7:18 better than the field: 11:36 faster on the clock, against 4:18 faster for everyone.
The fieldCompare these two →4:18 faster This athlete11:36 faster -
Maastricht5 Mar 2022Individual Open · Men2:04:30237/243Beat 3%