Progress against the field
Iza Tulkens has gained 2:23 on the field from Utrecht 2025 to Maastricht 2026.
The clock says 7:02 faster, but the races themselves got 4:39 quicker for everyone.
The largest gain on the field came from Utrecht 2025 → Amsterdam 2026: 3:16 in 54 days.
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 Pro · Women, the one raced most; every comparison is in the list below.
Every race
21 races · 15 events
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Hamburg28 Oct 2026HYROX ELITE 15 DOUBLES · Women57:48 PB10/15Beat 33%
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Valencia17 Oct 2026Doubles Open · Mixed55:03 PB2/312Beat 99%
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Maastricht19 Sep 2026Doubles Pro · Women56:26 PB2/204Beat 99%
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Maastricht19 Sep 2026Individual Pro · Women1:07:0410/160Beat 94%
↑ 241 days after Amsterdam 2026 0:53 worse than the field Why ↓Close ↑
0:53 behind the field: 1:04 slower on the clock, against 0:11 slower for everyone.
The fieldCompare these two →0:11 slower This athlete1:04 slower -
Stockholm18 Jun 2026Doubles Open · Mixed55:2450/825Beat 94%
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Stockholm18 Jun 2026Doubles Pro · Women57:474/689Beat 99%
↑ 35 days after Heerenveen 2026, with Michaela Disseldorp 2:05 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
0:55 slower on the clock, but the race was 3:00 slower for everyone, so this was 2:05 better than the field.
The fieldCompare these two →3:00 slower This pair0:55 slower -
Heerenveen14 May 2026Doubles Pro · Women56:522/231Beat 99%
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Helsinki9 May 2026Doubles Pro · Women56:551/115Beat 99%
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Rotterdam15 Apr 2026Doubles Pro · Women57:561/226Beat 100%
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Mechelen26 Mar 2026Relay · Women55:121/53Beat 98%
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Mechelen26 Mar 2026Doubles Pro · Women58:001/133Beat 99%
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Copenhagen13 Mar 2026Doubles Pro · Women1:13:16104/338Beat 69%
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Amsterdam21 Jan 2026Doubles Pro · Women1:01:286/183Beat 97%
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Amsterdam21 Jan 2026Individual Pro · Women1:06:00 PB2/44Beat 96%
↑ 54 days after Utrecht 2025 3:16 better than the field Why ↓Close ↑
3:16 better than the field: 8:06 faster on the clock, against 4:50 faster for everyone.
The fieldCompare these two →4:50 faster This athlete8:06 faster -
Utrecht28 Nov 2025Doubles Open · Mixed56:082/701Beat 100%
↑ 70 days after Maastricht 2025, with Joey Stol 2:51 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:41 faster on the clock, yet the race was 4:32 faster for everyone, so 2:51 was lost on the field.
The fieldCompare these two →4:32 faster This pair1:41 faster -
Utrecht28 Nov 2025Individual Pro · Women1:14:065/67Beat 93%
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Maastricht19 Sep 2025Doubles Open · Mixed57:491/658Beat 100%
↑ 162 days after Cologne 2025, with Joey Stol 0:58 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
0:33 slower on the clock in a race that was 1:31 slower for everyone: 0:58 gained on the field, which the clock hides.
The fieldCompare these two →1:31 slower This pair0:33 slower -
Cologne10 Apr 2025Doubles Open · Mixed57:163/921Beat 100%
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Rotterdam27 Feb 2025Doubles Open · Mixed1:05:198/220Beat 96%
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Amsterdam10 Oct 2024Doubles Open · Women1:21:4883/308Beat 73%
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Amsterdam10 Oct 2024Doubles Open · Women1:18:24 PB115/657Beat 83%