Progress against the field
Marc Kleen has dropped 8:10 behind the field from Belgium 2025 to Heerenveen 2026.
Over the same races everyone got 7:30 quicker, so 0:40 slower on the clock looks better than it was.
The longest gap between two races compared here, 237 days between Belgium 2025 and Utrecht 2025, cost 6:54 on 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
7 races · 7 events
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Hamburg28 Oct 2026Doubles Open · Men1:13:02 PB100/398Beat 75%
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Heerenveen14 May 2026Individual Open · Men1:27:42204/315Beat 35%
↑ 167 days after Utrecht 2025 1:16 worse than the field Faster on the clock, behind the field Why ↓Close ↑
5:51 faster on the clock, yet the race was 7:07 faster for everyone, so 1:16 was lost on the field.
The fieldCompare these two →7:07 faster This athlete5:51 faster -
Rotterdam15 Apr 2026Doubles Open · Mixed1:12:31 PB178/1047Beat 83%
↑ 84 days after Amsterdam 2026, with Dorien Beernink 0:28 better than the field Why ↓Close ↑
0:28 better than the field: 1:18 faster on the clock, against 0:50 faster for everyone.
The fieldCompare these two →0:50 faster This pair1:18 faster -
Amsterdam21 Jan 2026Doubles Open · Mixed1:13:49371/1206Beat 69%
↑ 91 days after Paris 2025, with Dorien Beernink 0:50 better than the field Why ↓Close ↑
0:50 better than the field: 7:16 faster on the clock, against 6:26 faster for everyone.
The fieldCompare these two →6:26 faster This pair7:16 faster -
Utrecht28 Nov 2025Individual Open · Men1:33:33838/1337Beat 37%
↑ 237 days after Belgium 2025 6:54 worse than the field Why ↓Close ↑
6:54 behind the field: 6:31 slower on the clock, against 0:23 faster for everyone.
The fieldCompare these two →0:23 faster This athlete6:31 slower -
Paris22 Oct 2025Doubles Open · Mixed1:21:05156/502Beat 69%
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Belgium5 Apr 2025Individual Open · Men1:27:02 PB857/1638Beat 48%