Progress against the field
From Rotterdam 2024 to Utrecht 2025, Jan Van Belzen got 10:56 faster than the field.
Over the same races everyone got 7:36 quicker, so 18:32 faster on the clock looks better than it was.
414 days between Amsterdam 2024 and Utrecht 2025 is the longest gap compared here, and the second race was 6:56 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 · Men, the one raced most; every comparison is in the list below.
Every race
10 races · 8 events
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Stockholm18 Jun 2026Doubles Pro · Men1:10:45613/704Beat 13%
↑ 64 days after Rotterdam 2026, with Oscar De Smit 3:35 worse than the field Why ↓Close ↑
3:35 behind the field: 5:32 slower on the clock, against 1:57 slower for everyone.
The fieldCompare these two →1:57 slower This pair5:32 slower -
Heerenveen14 May 2026Doubles Pro · Men1:11:10177/315Beat 44%
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Rotterdam15 Apr 2026Doubles Open · Mixed1:06:27 PB38/544Beat 93%
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Rotterdam15 Apr 2026Doubles Pro · Men1:05:13 PB142/385Beat 63%
↑ 20 days after Mechelen 2026, with Oscar De Smit 3:13 better than the field Why ↓Close ↑
3:36 faster on the clock, and the race was 0:23 faster for everyone, so 3:13 of it was this pair.
The fieldCompare these two →0:23 faster This pair3:36 faster -
Mechelen26 Mar 2026Doubles Pro · Men1:08:49300/493Beat 39%
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Utrecht28 Nov 2025Relay · Mixed1:02:407/40Beat 83%
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Utrecht28 Nov 2025Individual Open · Men1:25:11 PB234/575Beat 59%
↑ 414 days after Amsterdam 2024 6:56 better than the field Why ↓Close ↑
7:45 faster on the clock, and the race was 0:49 faster for everyone, so 6:56 of it was this athlete.
The fieldCompare these two →0:49 faster This athlete7:45 faster -
Heerenveen9 May 2025Doubles Open · Men1:09:46 PB80/309Beat 74%
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Amsterdam10 Oct 2024Individual Open · Men1:32:561050/1539Beat 32%
↑ 187 days after Rotterdam 2024 4:00 better than the field Why ↓Close ↑
10:47 faster on the clock, and the race was 6:47 faster for everyone, so 4:00 of it was this athlete.
The fieldCompare these two →6:47 faster This athlete10:47 faster -
Rotterdam6 Apr 2024Individual Open · Men1:43:431097/1380Beat 21%