Progress against the field
Between Rotterdam 2026 and Heerenveen 2026, Ronald Bos pulled 10:03 ahead of the field.
The clock says 11:50 faster, but the races themselves got 1:47 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
2 races · 2 events
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Heerenveen14 May 2026Individual Open · Men1:17:56 PB307/966Beat 68%
↑ 29 days after Rotterdam 2026 10:03 better than the field Why ↓Close ↑
11:50 faster on the clock, and the race was 1:47 faster for everyone, so 10:03 of it was this athlete.
The fieldCompare these two →1:47 faster This athlete11:50 faster -
Rotterdam15 Apr 2026Individual Open · Men1:29:46321/556Beat 42%