Progress against the field
Between Hamburg 2024 and Cologne 2025, Jonas Groothus pulled 8:24 ahead of the field.
Over the same races everyone got 3:11 quicker, so 11:35 faster on the clock looks better than it was.
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
11 races · 11 events
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Utrecht28 Nov 2025Doubles Open · Men1:07:48 PB177/879Beat 80%
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Heerenveen9 May 2025Doubles Open · Mixed1:15:17108/492Beat 78%
↑ 211 days after Amsterdam 2024, with Paula Groothus 0:49 better than the field Why ↓Close ↑
0:49 better than the field: 3:20 faster on the clock, against 2:31 faster for everyone.
The fieldCompare these two →2:31 faster This pair3:20 faster -
Cologne10 Apr 2025Individual Open · Men1:11:07 PB141/1182Beat 88%
↑ 159 days after Hamburg 2024 8:24 better than the field Why ↓Close ↑
8:24 better than the field: 11:35 faster on the clock, against 3:11 faster for everyone.
The fieldCompare these two →3:11 faster This athlete11:35 faster -
Frankfurt14 Dec 2024Individual Pro · Men1:37:05250/280Beat 11%
↑ 371 days after Frankfurt 2023 2:14 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:06 faster on the clock, yet the race was 2:20 faster for everyone, so 2:14 was lost on the field.
The fieldCompare these two →2:20 faster This athlete0:06 faster -
Hamburg2 Nov 2024Individual Open · Men1:22:42528/1248Beat 58%
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Amsterdam10 Oct 2024Doubles Open · Mixed1:18:37123/376Beat 67%
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Copenhagen23 Mar 2024Doubles Open · Mixed1:13:12 PB135/337Beat 60%
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Frankfurt9 Dec 2023Individual Pro · Men1:37:11150/173Beat 13%
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Stuttgart4 Feb 2023Individual Open · Men1:39:54220/267Beat 18%
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KölnDate unknownIndividual Pro · Men1:33:15 PB189/238Beat 21%
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KölnDate unknownIndividual Open · Men1:31:20283/446Beat 37%