Progress against the field
Iris Koster has dropped 2:18 behind the field from Utrecht 2025 to Maastricht 2026.
Over the same races everyone got 4:54 quicker, so 2:36 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.
Every race
4 races · 4 events
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Maastricht19 Sep 2026Individual Open · Women1:31:07 PB215/577Beat 63%
↑ 177 days after Mechelen 2026 1:22 better than the field Why ↓Close ↑
The race was 0:34 slower for everyone and the clock still says 0:48 faster: 1:22 gained on the field.
The fieldCompare these two →0:34 slower This athlete0:48 faster -
Heerenveen14 May 2026Doubles Pro · Women1:20:12 PB130/231Beat 44%
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Mechelen26 Mar 2026Individual Open · Women1:31:55335/776Beat 57%
↑ 118 days after Utrecht 2025 3:40 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:48 faster on the clock, yet the race was 5:28 faster for everyone, so 3:40 was lost on the field.
The fieldCompare these two →5:28 faster This athlete1:48 faster -
Utrecht28 Nov 2025Individual Open · Women1:33:43270/619Beat 56%