Progress against the field
Between Amsterdam 2023 and Rotterdam 2026, Guus Lieshout lost 10:49 to the field.
Over the same races everyone got 14:33 quicker, so 3:44 faster on the clock looks better than it was.
The longest gap between two races compared here, 414 days between Amsterdam 2024 and Utrecht 2025, still ended 1:35 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
9 races · 9 events
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Heerenveen14 May 2026Doubles Open · Men1:05:41 PB95/535Beat 82%
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Rotterdam15 Apr 2026Individual Open · Men1:24:13234/570Beat 59%
↑ 84 days after Amsterdam 2026 10:35 worse than the field Why ↓Close ↑
10:35 behind the field: 8:27 slower on the clock, against 2:08 faster for everyone.
The fieldCompare these two →2:08 faster This athlete8:27 slower -
Amsterdam21 Jan 2026Individual Open · Men1:15:46 PB160/608Beat 74%
↑ 54 days after Utrecht 2025 2:51 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:16 faster on the clock looks better than it was: the race was 5:07 faster for everyone, which leaves this 2:51 behind the field.
The fieldCompare these two →5:07 faster This athlete2:16 faster -
Utrecht28 Nov 2025Individual Open · Men1:18:02269/1337Beat 80%
↑ 414 days after Amsterdam 2024 1:35 better than the field Why ↓Close ↑
2:24 faster on the clock, and the race was 0:49 faster for everyone, so 1:35 of it was this athlete.
The fieldCompare these two →0:49 faster This athlete2:24 faster -
Heerenveen9 May 2025Individual Pro · Men1:25:00123/216Beat 43%
↑ 71 days after Rotterdam 2025 4:01 worse than the field Why ↓Close ↑
4:01 behind the field: 0:49 slower on the clock, against 3:12 faster for everyone.
The fieldCompare these two →3:12 faster This athlete0:49 slower -
Rotterdam27 Feb 2025Individual Pro · Men1:24:11 PB92/196Beat 53%
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Amsterdam10 Oct 2024Individual Open · Men1:20:26522/1539Beat 66%
↑ 341 days after Amsterdam 2023 1:02 better than the field Why ↓Close ↑
7:31 faster on the clock, and the race was 6:29 faster for everyone, so 1:02 of it was this athlete.
The fieldCompare these two →6:29 faster This athlete7:31 faster -
Rotterdam6 Apr 2024Doubles Open · Mixed1:37:36 PB466/534Beat 13%
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Amsterdam4 Nov 2023Individual Open · Men1:27:57487/1079Beat 55%