Progress against the field
From Amsterdam 2026 to Maastricht 2026, Marissa Janssen got 4:58 faster than the field.
The races themselves barely changed, so 4:40 faster on the clock is the real picture.
The largest gain on the field came from Heerenveen 2026 → Maastricht 2026: 5:57 in 128 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.
Every race
4 races · 4 events
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Maastricht19 Sep 2026Individual Open · Women1:18:28 PB51/577Beat 91%
↑ 128 days after Heerenveen 2026 5:57 better than the field Why ↓Close ↑
4:20 faster on the clock in a race that was 1:37 slower for everyone: 5:57 better than the field.
The fieldCompare these two →1:37 slower This athlete4:20 faster -
Heerenveen14 May 2026Individual Open · Women1:22:4885/427Beat 80%
↑ 113 days after Amsterdam 2026 0:59 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:20 faster on the clock, yet the race was 1:19 faster for everyone, so 0:59 was lost on the field.
The fieldCompare these two →1:19 faster This athlete0:20 faster -
Mechelen26 Mar 2026Doubles Open · Mixed1:11:37 PB107/394Beat 73%
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Amsterdam21 Jan 2026Individual Open · Women1:23:0868/287Beat 76%