Progress against the field
Between Maastricht 2025 and Rotterdam 2026, Joyce van Spronsen and Randy van Spronsen lost 1:55 to the field.
Over the same races everyone got 6:13 quicker, so 4:18 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. The summary above covers Doubles Open · Mixed, with Randy van Spronsen, the one raced most; every comparison is in the list below.
Every race
5 races · 5 events
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Maastricht19 Sep 2026Doubles Pro · Women1:27:12 PB145/204Beat 29%
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Rotterdam15 Apr 2026Doubles Open · Mixed1:16:16 PB133/544Beat 76%
↑ 208 days after Maastricht 2025, with Randy van Spronsen 1:55 worse than the field Faster on the clock, behind the field Why ↓Close ↑
4:18 faster on the clock, yet the race was 6:13 faster for everyone, so 1:55 was lost on the field.
The fieldCompare these two →6:13 faster This pair4:18 faster -
Mechelen26 Mar 2026Doubles Open · Women1:18:44 PB91/285Beat 68%
↑ 104 days after Gent 2025, with Lara De Blok 2:44 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:00 faster on the clock looks better than it was: the race was 4:44 faster for everyone, which leaves this 2:44 behind the field.
The fieldCompare these two →4:44 faster This pair2:00 faster -
Gent12 Dec 2025Doubles Open · Women1:20:44249/882Beat 72%
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Maastricht19 Sep 2025Doubles Open · Mixed1:20:34230/658Beat 65%