Progress against the field
Between Maastricht 2025 and Amsterdam 2026, Erik Ipema and Nienke Tjalsma pulled 1:47 ahead of the field.
The clock says 9:13 faster, but the races themselves got 7:26 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 · Mixed, with Nienke Tjalsma, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Valencia17 Oct 2026Doubles Open · Mixed1:12:0366/302Beat 78%
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Heerenveen14 May 2026Individual Open · Men1:11:25 PB147/966Beat 85%
↑ 29 days after Rotterdam 2026 0:28 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:19 faster on the clock, yet the race was 1:47 faster for everyone, so 0:28 was lost on the field.
The fieldCompare these two →1:47 faster This athlete1:19 faster -
Rotterdam15 Apr 2026Individual Open · Men1:12:44173/1192Beat 86%
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Amsterdam21 Jan 2026Doubles Open · Mixed1:09:52 PB214/1206Beat 82%
↑ 40 days after Gent 2025, with Nienke Tjalsma 1:46 better than the field Why ↓Close ↑
1:46 better than the field: 3:27 faster on the clock, against 1:41 faster for everyone.
The fieldCompare these two →1:41 faster This pair3:27 faster -
Gent12 Dec 2025Doubles Open · Mixed1:13:19212/863Beat 75%
↑ 84 days after Maastricht 2025, with Nienke Tjalsma 0:01 better than the field Why ↓Close ↑
5:46 faster on the clock, and the race was 5:45 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →5:45 faster This pair5:46 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:19:05203/658Beat 69%