Progress against the field
Between Heerenveen 2025 and Amsterdam 2026, Mark van Blijenburgh and Kasper Heijdra pulled 1:08 ahead of the field.
Over the same races everyone got 3:27 quicker, so 4:35 faster on the clock looks better than it was.
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 · Mixed1:25:47 PB318/461Beat 31%
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Amsterdam21 Jan 2026Doubles Open · Men1:14:21 PB585/994Beat 41%
↑ 257 days after Heerenveen 2025, with Kasper Heijdra 1:08 better than the field Why ↓Close ↑
1:08 better than the field: 4:35 faster on the clock, against 3:27 faster for everyone.
The fieldCompare these two →3:27 faster This pair4:35 faster -
Utrecht28 Nov 2025Individual Open · Men1:35:29 PB906/1337Beat 32%
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Heerenveen9 May 2025Doubles Open · Men1:18:56365/529Beat 31%