Progress against the field
Between Heerenveen 2025 and Heerenveen 2026, Gerda Ferbeek and Renske Ritzema lost 2:34 to the field.
The clock says 1:13 faster, but the races themselves got 3:47 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
4 races · 4 events
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Heerenveen14 May 2026Doubles Open · Women1:29:06 PB419/737Beat 43%
↑ 370 days after Heerenveen 2025, with Renske Ritzema 2:34 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:13 faster on the clock looks better than it was: the race was 3:47 faster for everyone, which leaves this 2:34 behind the field.
The fieldCompare these two →3:47 faster This pair1:13 faster -
Amsterdam21 Jan 2026Individual Open · Women1:44:02 PB885/1122Beat 21%
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Utrecht28 Nov 2025Doubles Open · Mixed1:33:15 PB294/381Beat 23%
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Heerenveen9 May 2025Doubles Open · Women1:30:19319/566Beat 44%