Progress against the field
Tess Bosma has gained 17:29 on the field from Heerenveen 2025 to Mechelen 2026.
The clock says 23:35 faster, but the races themselves got 6:06 quicker for everyone.
257 days between Heerenveen 2025 and Amsterdam 2026 is the longest gap compared here, and the second race was 16:19 better than the field.
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
11 races · 8 events
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Heerenveen14 May 2026Relay · Mixed1:02:116/66Beat 91%
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Heerenveen14 May 2026Doubles Open · Women1:11:06 PB33/513Beat 94%
↑ 167 days after Utrecht 2025, with Ilse Bosma 0:41 better than the field Why ↓Close ↑
4:41 faster on the clock, and the race was 4:00 faster for everyone, so 0:41 of it was this pair.
The fieldCompare these two →4:00 faster This pair4:41 faster -
Mechelen26 Mar 2026Doubles Open · Mixed1:05:17 PB76/962Beat 92%
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Mechelen26 Mar 2026Individual Open · Women1:15:59 PB33/300Beat 89%
↑ 64 days after Amsterdam 2026 1:10 better than the field Why ↓Close ↑
2:28 faster on the clock, and the race was 1:18 faster for everyone, so 1:10 of it was this athlete.
The fieldCompare these two →1:18 faster This athlete2:28 faster -
Amsterdam21 Jan 2026Individual Open · Women1:18:2725/287Beat 91%
↑ 257 days after Heerenveen 2025 16:19 better than the field Why ↓Close ↑
16:19 better than the field: 21:07 faster on the clock, against 4:48 faster for everyone.
The fieldCompare these two →4:48 faster This athlete21:07 faster -
Utrecht28 Nov 2025Doubles Open · Women1:15:4785/828Beat 90%
↑ 237 days after Belgium 2025, with Ilse Bosma 10:31 better than the field Why ↓Close ↑
10:31 better than the field: 13:22 faster on the clock, against 2:51 faster for everyone.
The fieldCompare these two →2:51 faster This pair13:22 faster -
Heerenveen9 May 2025Doubles Open · Women1:28:29276/566Beat 51%
↑ 71 days after Rotterdam 2025, with Rinske De Vries 0:43 better than the field Why ↓Close ↑
3:10 faster on the clock, and the race was 2:27 faster for everyone, so 0:43 of it was this pair.
The fieldCompare these two →2:27 faster This pair3:10 faster -
Heerenveen9 May 2025Individual Open · Women1:39:34121/183Beat 34%
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Belgium5 Apr 2025Doubles Open · Women1:29:09391/713Beat 45%
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Rotterdam27 Feb 2025Doubles Open · Women1:31:39430/633Beat 32%
↑ 140 days after Amsterdam 2024, with Rinske De Vries 4:47 better than the field Why ↓Close ↑
4:47 better than the field: 8:25 faster on the clock, against 3:38 faster for everyone.
The fieldCompare these two →3:38 faster This pair8:25 faster -
Amsterdam10 Oct 2024Doubles Open · Women1:40:04541/657Beat 18%