Progress against the field
From Heerenveen 2025 to Amsterdam 2026, Sanne van der Zanden and Ilona Stouwdam-Zoer got 0:40 faster than the field.
The clock says 3:35 faster, but the races themselves got 2:55 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
5 races · 4 events
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Rotterdam15 Apr 2026Relay · Women1:15:2918/84Beat 79%
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Amsterdam21 Jan 2026Doubles Open · Women1:15:02 PB152/1030Beat 85%
↑ 257 days after Heerenveen 2025, with Ilona Stouwdam-Zoer 0:40 better than the field Why ↓Close ↑
0:40 better than the field: 3:35 faster on the clock, against 2:55 faster for everyone.
The fieldCompare these two →2:55 faster This pair3:35 faster -
Amsterdam21 Jan 2026Individual Open · Women1:34:41 PB148/288Beat 49%
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Utrecht28 Nov 2025Doubles Pro · Women1:20:49 PB20/59Beat 66%
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Heerenveen9 May 2025Doubles Open · Women1:18:3772/566Beat 87%