Progress against the field
Between Rotterdam 2023 and Amsterdam 2023, Bastienne Bos lost 6:30 to the field.
The clock says 4:38 slower, but the races themselves got 1:52 quicker for everyone.
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 2026Relay · Women1:36:2037/43Beat 14%
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Heerenveen9 May 2025Individual Pro · Women2:24:19 PB103/105Beat 2%
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Amsterdam4 Nov 2023Individual Open · Women2:00:45361/394Beat 8%
↑ 168 days after Rotterdam 2023 6:30 worse than the field Why ↓Close ↑
4:38 slower on the clock in a race that was 1:52 faster for everyone: 6:30 lost to the field.
The fieldCompare these two →1:52 faster This athlete4:38 slower -
Rotterdam20 May 2023Individual Open · Women1:56:07 PB242/290Beat 17%