Progress against the field
Between Amsterdam 2022 and Amsterdam 2023, Marion Dekker kept pace with the field.
The clock says 4:41 faster, but the races themselves got 4:43 quicker for everyone.
The biggest step was Maastricht European Championships 2023 → Rotterdam 2023: 2:10 on the field in 119 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
15 races · 14 events
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Stockholm18 Jun 2026Doubles Pro · Women1:09:46349/689Beat 49%
↑ 35 days after Heerenveen 2026, with Lindsay Tai-Tin-Woei 0:04 better than the field Why ↓Close ↑
Moved with the field: 2:56 slower on the clock, against 3:00 slower for everyone.
The fieldCompare these two →3:00 slower This pair2:56 slower -
Heerenveen14 May 2026Doubles Open · Mixed1:45:37763/808Beat 6%
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Heerenveen14 May 2026Doubles Pro · Women1:06:50 PB34/231Beat 85%
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Mechelen26 Mar 2026Doubles Pro · Women1:08:2036/133Beat 73%
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Utrecht28 Nov 2025Doubles Pro · Women1:08:019/102Beat 91%
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Valencia17 Oct 2025Doubles Pro · Women1:15:3227/77Beat 65%
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Heerenveen9 May 2025Doubles Open · Mixed1:09:50 PB51/492Beat 90%
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Amsterdam10 Oct 2024Doubles Pro · Women1:07:574/67Beat 94%
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Maastricht20 Jan 2024Individual Pro · Women1:18:5816/35Beat 54%
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Amsterdam4 Nov 2023Individual Open · Women1:12:57 PB12/394Beat 97%
↑ 168 days after Rotterdam 2023 1:13 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:39 faster on the clock, yet the race was 1:52 faster for everyone, so 1:13 was lost on the field.
The fieldCompare these two →1:52 faster This athlete0:39 faster -
Rotterdam20 May 2023Individual Open · Women1:13:369/290Beat 97%
↑ 119 days after Maastricht European Championships 2023 2:10 better than the field Why ↓Close ↑
2:31 faster on the clock, and the race was 0:21 faster for everyone, so 2:10 of it was this athlete.
The fieldCompare these two →0:21 faster This athlete2:31 faster -
Maastricht European Championships21 Jan 2023Individual Open · Women1:16:0747/258Beat 82%
↑ 91 days after Amsterdam 2022 0:59 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:31 faster on the clock, yet the race was 2:30 faster for everyone, so 0:59 was lost on the field.
The fieldCompare these two →2:30 faster This athlete1:31 faster -
Amsterdam22 Oct 2022Individual Open · Women1:17:3820/218Beat 91%
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World Championships NiceDate unknownIndividual Pro · Women1:15:52180/677Beat 73%
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KölnDate unknownIndividual Pro · Women1:15:44 PB34/72Beat 53%