Progress against the field
Between Amsterdam 2026 and Heerenveen 2026, Tirza Dumernit kept pace with the field.
The clock says 1:06 faster, but the races themselves got 1:19 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 Individual Open · Women, the one raced most; every comparison is in the list below.
Every race
4 races · 4 events
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Heerenveen14 May 2026Individual Open · Women1:25:07 PB105/427Beat 75%
↑ 113 days after Amsterdam 2026 0:13 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:06 faster on the clock looks better than it was: the race was 1:19 faster for everyone, which leaves this 0:13 behind the field.
The fieldCompare these two →1:19 faster This athlete1:06 faster -
Amsterdam21 Jan 2026Individual Open · Women1:26:13363/1122Beat 68%
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Rotterdam27 Feb 2025Doubles Open · Women1:21:18 PB73/243Beat 70%
↑ 140 days after Amsterdam 2024, with Tess Glansdorp 0:37 worse than the field Faster on the clock, behind the field Why ↓Close ↑
3:01 faster on the clock looks better than it was: the race was 3:38 faster for everyone, which leaves this 0:37 behind the field.
The fieldCompare these two →3:38 faster This pair3:01 faster -
Amsterdam10 Oct 2024Doubles Open · Women1:24:19256/657Beat 61%