Progress against the field
Tammy Knopjes and Demi van Lienden have dropped 3:17 behind the field from Maastricht 2025 to Heerenveen 2026.
The clock says 0:31 faster, but the races themselves got 3:48 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. The summary above covers Doubles Open · Women, with Demi van Lienden, the one raced most; every comparison is in the list below.
Every race
8 races · 8 events
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Heerenveen14 May 2026Doubles Open · Women1:15:34 PB88/513Beat 83%
↑ 237 days after Maastricht 2025, with Demi van Lienden 3:17 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:31 faster on the clock looks better than it was: the race was 3:48 faster for everyone, which leaves this 3:17 behind the field.
The fieldCompare these two →3:48 faster This pair0:31 faster -
Amsterdam21 Jan 2026Doubles Open · Mixed1:14:09 PB387/1206Beat 68%
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Utrecht28 Nov 2025Doubles Open · Women1:33:38575/828Beat 31%
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Maastricht19 Sep 2025Doubles Open · Women1:16:0542/329Beat 87%
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Beijing23 Aug 2025Doubles Open · Mixed1:15:1465/291Beat 78%
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Heerenveen9 May 2025Doubles Open · Mixed1:17:56170/492Beat 65%
↑ 34 days after Belgium 2025, with Stefan Wehnes 1:50 better than the field Why ↓Close ↑
1:50 better than the field: 4:06 faster on the clock, against 2:16 faster for everyone.
The fieldCompare these two →2:16 faster This pair4:06 faster -
Belgium5 Apr 2025Doubles Open · Mixed1:22:02394/722Beat 45%
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Rotterdam27 Feb 2025Individual Open · Women1:44:00 PB304/411Beat 26%