Progress against the field
Between Belgium 2025 and Rotterdam 2026, Ivo Birsak pulled 5:45 ahead of the field.
Over the same races everyone got 4:06 quicker, so 9:51 faster on the clock looks better than it was.
355 days between Belgium 2025 and Mechelen 2026 is the longest gap compared here, and the second race was 3:51 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.
Every race
3 races · 3 events
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Rotterdam15 Apr 2026Individual Open · Men2:00:43 PB529/556Beat 5%
↑ 20 days after Mechelen 2026 9:36 better than the field Why ↓Close ↑
9:15 faster on the clock in a race that was 0:21 slower for everyone: 9:36 better than the field.
The fieldCompare these two →0:21 slower This athlete9:15 faster -
Mechelen26 Mar 2026Individual Open · Men2:09:581339/1363Beat 2%
↑ 355 days after Belgium 2025 3:51 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:36 faster on the clock looks better than it was: the race was 4:27 faster for everyone, which leaves this 3:51 behind the field.
The fieldCompare these two →4:27 faster This athlete0:36 faster -
Belgium5 Apr 2025Individual Open · Men2:10:341610/1638Beat 2%