Progress against the field
Between Maastricht 2024 and Maastricht 2026, Stef Aelmans lost 0:50 to the field.
The clock says 5:46 faster, but the races themselves got 6:36 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. The summary above covers Individual Open · Men, the one raced most; every comparison is in the list below.
Every race
7 races · 7 events
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Maastricht19 Sep 2026Individual Open · Men1:15:12 PB254/1119Beat 77%
↑ 709 days after Amsterdam 2024 0:55 better than the field Why ↓Close ↑
3:21 faster on the clock, and the race was 2:26 faster for everyone, so 0:55 of it was this athlete.
The fieldCompare these two →2:26 faster This athlete3:21 faster -
Malaga16 Apr 2026Doubles Open · Mixed1:10:15 PB84/332Beat 75%
↑ 335 days after Berlin 2025, with Tessa Haan 1:26 better than the field Why ↓Close ↑
0:49 faster on the clock in a race that was 0:37 slower for everyone: 1:26 better than the field.
The fieldCompare these two →0:37 slower This pair0:49 faster -
Mechelen26 Mar 2026Doubles Open · Men1:11:32350/867Beat 60%
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Utrecht28 Nov 2025Doubles Open · Men1:11:10 PB272/879Beat 69%
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Berlin16 May 2025Doubles Open · Mixed1:11:04173/528Beat 67%
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Amsterdam10 Oct 2024Individual Open · Men1:18:33434/1539Beat 72%
↑ 264 days after Maastricht 2024 1:45 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:25 faster on the clock looks better than it was: the race was 4:10 faster for everyone, which leaves this 1:45 behind the field.
The fieldCompare these two →4:10 faster This athlete2:25 faster -
Maastricht20 Jan 2024Individual Open · Men1:20:58271/781Beat 65%