Progress against the field
Between Heerenveen 2025 and Heerenveen 2026, Marieke Buitelaar lost 2:18 to the field.
The clock says 3:49 faster, but the races themselves got 6:07 quicker for everyone.
257 days between Heerenveen 2025 and Amsterdam 2026 is the longest gap compared here, and the second race was 4:14 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. The summary above covers Individual Open · Women, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Heerenveen14 May 2026Individual Open · Women1:25:01 PB104/427Beat 76%
↑ 113 days after Amsterdam 2026 1:56 better than the field Why ↓Close ↑
1:56 better than the field: 3:15 faster on the clock, against 1:19 faster for everyone.
The fieldCompare these two →1:19 faster This athlete3:15 faster -
Rotterdam15 Apr 2026Doubles Open · Women1:24:31 PB181/466Beat 61%
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Mechelen26 Mar 2026Doubles Open · Mixed1:19:30 PB460/962Beat 52%
↑ 188 days after Maastricht 2025, with Erwin Buitelaar 0:21 better than the field Why ↓Close ↑
0:21 better than the field: 7:02 faster on the clock, against 6:41 faster for everyone.
The fieldCompare these two →6:41 faster This pair7:02 faster -
Amsterdam21 Jan 2026Individual Open · Women1:28:16440/1122Beat 61%
↑ 257 days after Heerenveen 2025 4:14 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:34 faster on the clock, yet the race was 4:48 faster for everyone, so 4:14 was lost on the field.
The fieldCompare these two →4:48 faster This athlete0:34 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:26:32216/364Beat 41%
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Heerenveen9 May 2025Individual Open · Women1:28:50169/571Beat 70%