Progress against the field
Between Amsterdam 2023 and Mechelen 2026, Marcha Duijkers lost 5:35 to the field.
The clock says 12:01 faster, but the races themselves got 17:36 quicker for everyone.
The largest gain on the field came from Amsterdam 2023 → Maastricht 2024: 3:24 in 77 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 Open · Women, the one raced most; every comparison is in the list below.
Every race
16 races · 15 events
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Berlin22 May 2026Doubles Open · Women1:05:09 PB6/777Beat 99%
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Heerenveen14 May 2026Individual Pro · Women1:17:1137/155Beat 76%
↑ 113 days after Amsterdam 2026 4:41 worse than the field Why ↓Close ↑
4:47 slower on the clock in a race that was 0:06 slower for everyone: 4:41 lost to the field.
The fieldCompare these two →0:06 slower This athlete4:47 slower -
Mechelen26 Mar 2026Individual Open · Women1:09:5613/776Beat 98%
↑ 64 days after Amsterdam 2026 2:02 worse than the field Why ↓Close ↑
2:02 behind the field: 0:44 slower on the clock, against 1:18 faster for everyone.
The fieldCompare these two →1:18 faster This athlete0:44 slower -
Amsterdam21 Jan 2026Individual Open · Women1:09:12 PB20/1122Beat 98%
↑ 328 days after Rotterdam 2025 0:55 worse than the field Faster on the clock, behind the field Why ↓Close ↑
4:02 faster on the clock, yet the race was 4:57 faster for everyone, so 0:55 was lost on the field.
The fieldCompare these two →4:57 faster This athlete4:02 faster -
Amsterdam21 Jan 2026Individual Pro · Women1:12:24 PB11/44Beat 75%
↑ 124 days after Maastricht 2025 0:39 worse than the field Faster on the clock, behind the field Why ↓Close ↑
6:38 faster on the clock looks better than it was: the race was 7:17 faster for everyone, which leaves this 0:39 behind the field.
The fieldCompare these two →7:17 faster This athlete6:38 faster -
Gent12 Dec 2025Doubles Open · Mixed1:03:1639/863Beat 96%
↑ 251 days after Belgium 2025, with Jeroen Van Der Weijden 1:16 better than the field Why ↓Close ↑
3:58 faster on the clock, and the race was 2:42 faster for everyone, so 1:16 of it was this pair.
The fieldCompare these two →2:42 faster This pair3:58 faster -
Utrecht28 Nov 2025Doubles Open · Mixed1:00:40 PB7/701Beat 99%
↑ 203 days after Heerenveen 2025, with Reno van Heiningen 0:41 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:00 faster on the clock looks better than it was: the race was 1:41 faster for everyone, which leaves this 0:41 behind the field.
The fieldCompare these two →1:41 faster This pair1:00 faster -
Maastricht19 Sep 2025Individual Pro · Women1:19:0216/51Beat 69%
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Heerenveen9 May 2025Doubles Open · Mixed1:01:406/250Beat 98%
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Belgium5 Apr 2025Doubles Open · Mixed1:07:1462/722Beat 91%
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Rotterdam27 Feb 2025Individual Open · Women1:13:1416/506Beat 97%
↑ 140 days after Amsterdam 2024 3:48 worse than the field Why ↓Close ↑
3:48 behind the field: 0:59 slower on the clock, against 2:49 faster for everyone.
The fieldCompare these two →2:49 faster This athlete0:59 slower -
Amsterdam10 Oct 2024Individual Open · Women1:12:1522/678Beat 97%
↑ 187 days after Rotterdam 2024 0:23 better than the field Why ↓Close ↑
2:05 faster on the clock, and the race was 1:42 faster for everyone, so 0:23 of it was this athlete.
The fieldCompare these two →1:42 faster This athlete2:05 faster -
Rotterdam6 Apr 2024Individual Open · Women1:14:2029/585Beat 95%
↑ 77 days after Maastricht 2024 2:37 worse than the field Why ↓Close ↑
0:15 slower on the clock in a race that was 2:22 faster for everyone: 2:37 lost to the field.
The fieldCompare these two →2:22 faster This athlete0:15 slower -
Maastricht20 Jan 2024Individual Open · Women1:14:0522/314Beat 93%
↑ 77 days after Amsterdam 2023 3:24 better than the field Why ↓Close ↑
7:52 faster on the clock, and the race was 4:28 faster for everyone, so 3:24 of it was this athlete.
The fieldCompare these two →4:28 faster This athlete7:52 faster -
Amsterdam4 Nov 2023Individual Open · Women1:21:5749/394Beat 88%
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World ChampionshipsDate unknownIndividual Pro · Women1:16:52311/470Beat 34%