Progress against the field
Between Amsterdam 2026 and Rotterdam 2026, Sandra Booms lost 21:15 to the field.
The races themselves barely changed, so 21:01 slower on the clock is the real picture.
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
2 races · 2 events
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Rotterdam15 Apr 2026Individual Open · Women2:13:29445/485Beat 8%
↑ 84 days after Amsterdam 2026 21:15 worse than the field Why ↓Close ↑
21:15 behind the field: 21:01 slower on the clock, against 0:14 faster for everyone.
The fieldCompare these two →0:14 faster This athlete21:01 slower -
Amsterdam21 Jan 2026Individual Open · Women1:52:28 PB1003/1122Beat 11%