Progress against the field
From Rotterdam 2024 to Heerenveen 2026, Henk Van Delft and Mark Van de Grift got 6:46 faster than the field.
The clock says 10:35 faster, but the races themselves got 3:49 quicker for everyone.
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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Heerenveen14 May 2026Doubles Open · Men1:03:11 PB81/494Beat 84%
↑ 768 days after Rotterdam 2024, with Mark Van de Grift 6:46 better than the field Why ↓Close ↑
6:46 better than the field: 10:35 faster on the clock, against 3:49 faster for everyone.
The fieldCompare these two →3:49 faster This pair10:35 faster -
Rotterdam15 Apr 2026Individual Open · Men1:15:49 PB116/556Beat 79%
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Amsterdam10 Oct 2024Doubles Open · Men1:03:4766/855Beat 92%
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Rotterdam6 Apr 2024Doubles Open · Men1:13:46247/722Beat 66%