Progress against the field
From Rotterdam 2025 to Rotterdam 2026, Sander Kalkman got 3:32 faster than the field.
Over the same races everyone got 7:34 quicker, so 11:06 faster on the clock looks better than it was.
208 days between Maastricht 2025 and Rotterdam 2026 is the longest gap compared here, and the second race was 11:13 better than 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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Rotterdam15 Apr 2026Individual Open · Men1:08:37 PB78/1192Beat 94%
↑ 208 days after Maastricht 2025 11:13 better than the field Why ↓Close ↑
18:27 faster on the clock, and the race was 7:14 faster for everyone, so 11:13 of it was this athlete.
The fieldCompare these two →7:14 faster This athlete18:27 faster -
Amsterdam21 Jan 2026Doubles Pro · Men1:04:10 PB117/298Beat 61%
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Gent12 Dec 2025Doubles Open · Men1:00:04 PB51/1164Beat 96%
↑ 14 days after Utrecht 2025, with Jan-Willem Kalkman 0:27 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:41 faster on the clock looks better than it was: the race was 2:08 faster for everyone, which leaves this 0:27 behind the field.
The fieldCompare these two →2:08 faster This pair1:41 faster -
Utrecht28 Nov 2025Doubles Open · Men1:01:4553/879Beat 94%
↑ 237 days after Belgium 2025, with Jan-Willem Kalkman 1:46 better than the field Why ↓Close ↑
1:50 faster on the clock, and the race was 0:04 faster for everyone, so 1:46 of it was this pair.
The fieldCompare these two →0:04 faster This pair1:50 faster -
Maastricht19 Sep 2025Individual Open · Men1:27:04568/1352Beat 58%
↑ 204 days after Rotterdam 2025 7:41 worse than the field Why ↓Close ↑
7:41 behind the field: 7:21 slower on the clock, against 0:20 faster for everyone.
The fieldCompare these two →0:20 faster This athlete7:21 slower -
Belgium5 Apr 2025Doubles Open · Men1:03:35104/898Beat 88%
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Rotterdam27 Feb 2025Individual Open · Men1:19:43387/1283Beat 70%