Progress against the field
From Rotterdam 2024 to Amsterdam 2024, Betteco De Boer got 0:42 faster than the field.
The clock says 2:24 faster, but the races themselves got 1:42 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. The summary above covers Individual Open · Women, the one raced most; every comparison is in the list below.
Every race
4 races · 4 events
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Stockholm18 Jun 2026Doubles Pro · Women1:12:43460/689Beat 33%
↑ 202 days after Utrecht 2025, with Katerina Tucker 1:42 worse than the field Why ↓Close ↑
2:42 slower on the clock in a race that was 1:00 slower for everyone: 1:42 lost to the field.
The fieldCompare these two →1:00 slower This pair2:42 slower -
Utrecht28 Nov 2025Doubles Pro · Women1:10:01 PB14/102Beat 86%
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Amsterdam10 Oct 2024Individual Open · Women1:18:31 PB64/678Beat 91%
↑ 187 days after Rotterdam 2024 0:42 better than the field Why ↓Close ↑
2:24 faster on the clock, and the race was 1:42 faster for everyone, so 0:42 of it was this athlete.
The fieldCompare these two →1:42 faster This athlete2:24 faster -
Rotterdam6 Apr 2024Individual Open · Women1:20:5584/585Beat 86%