Progress against the field
Between Amsterdam 2024 and Heerenveen 2026, Tom Kolsteeg and Ilse Kolsteeg lost 8:19 to the field.
Over the same races everyone got 8:47 quicker, so 0:28 faster on the clock looks better than it was.
414 days between Amsterdam 2024 and Utrecht 2025 is the longest gap compared here, and the second race was 7:42 behind 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.
Every race
5 races · 5 events
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Heerenveen14 May 2026Doubles Open · Mixed1:16:46 PB301/808Beat 63%
↑ 167 days after Utrecht 2025, with Ilse Kolsteeg 0:37 worse than the field Faster on the clock, behind the field Why ↓Close ↑
4:29 faster on the clock, yet the race was 5:06 faster for everyone, so 0:37 was lost on the field.
The fieldCompare these two →5:06 faster This pair4:29 faster -
Rotterdam15 Apr 2026Doubles Open · Men1:16:07268/580Beat 54%
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Utrecht28 Nov 2025Doubles Open · Mixed1:21:15277/701Beat 61%
↑ 414 days after Amsterdam 2024, with Ilse Kolsteeg 7:42 worse than the field Why ↓Close ↑
7:42 behind the field: 4:01 slower on the clock, against 3:41 faster for everyone.
The fieldCompare these two →3:41 faster This pair4:01 slower -
Amsterdam10 Oct 2024Doubles Open · Mixed1:17:14103/376Beat 73%
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Rotterdam6 Apr 2024Doubles Open · Men1:16:00 PB313/722Beat 57%