Progress against the field
From Heerenveen 2025 to Heerenveen 2026, Isabelle den Hartog got 5:43 faster than the field.
Over the same races everyone got 5:42 quicker, so 11:25 faster on the clock looks better than it was.
The longest gap between two races compared here, 203 days between Heerenveen 2025 and Utrecht 2025, still ended 1:53 ahead of 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
13 races · 11 events
-
Maastricht19 Sep 2026Doubles Open · Mixed1:03:01 PB19/687Beat 97%
↑ 241 days after Amsterdam 2026, with Rens Van Druenen 5:25 better than the field Why ↓Close ↑
4:58 faster on the clock in a race that was 0:27 slower for everyone: 5:25 better than the field.
The fieldCompare these two →0:27 slower This pair4:58 faster -
Heerenveen14 May 2026Doubles Open · Women1:12:02 PB49/737Beat 93%
↑ 49 days after Mechelen 2026, with Denise van Es 0:42 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:32 faster on the clock looks better than it was: the race was 1:14 faster for everyone, which leaves this 0:42 behind the field.
The fieldCompare these two →1:14 faster This pair0:32 faster -
Heerenveen14 May 2026Individual Open · Women1:14:25 PB14/205Beat 93%
↑ 167 days after Utrecht 2025 3:50 better than the field Why ↓Close ↑
7:33 faster on the clock, and the race was 3:43 faster for everyone, so 3:50 of it was this athlete.
The fieldCompare these two →3:43 faster This athlete7:33 faster -
Rotterdam15 Apr 2026Doubles Open · Women1:14:51117/936Beat 88%
-
Rotterdam15 Apr 2026Doubles Open · Mixed1:10:38135/1047Beat 87%
-
Mechelen26 Mar 2026Doubles Open · Women1:12:3471/1017Beat 93%
-
Amsterdam21 Jan 2026Doubles Open · Mixed1:07:59159/1206Beat 87%
↑ 124 days after Maastricht 2025, with Rens Van Druenen 3:57 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:53 faster on the clock, yet the race was 6:50 faster for everyone, so 3:57 was lost on the field.
The fieldCompare these two →6:50 faster This pair2:53 faster -
Gent12 Dec 2025Individual Pro · Women1:28:3669/114Beat 40%
-
Utrecht28 Nov 2025Individual Open · Women1:21:5887/619Beat 86%
↑ 203 days after Heerenveen 2025 1:53 better than the field Why ↓Close ↑
1:53 better than the field: 3:52 faster on the clock, against 1:59 faster for everyone.
The fieldCompare these two →1:59 faster This athlete3:52 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:10:5233/364Beat 91%
-
Heerenveen9 May 2025Individual Open · Women1:25:50129/571Beat 77%
-
Rotterdam27 Feb 2025Doubles Open · Mixed1:15:50181/707Beat 74%
-
Abu DhabiDate unknownIndividual Pro · Women1:17:14 PB17/49Beat 65%