Progress against the field
Between Birmingham 2025 and Manchester 2026, Isla Robertson lost 3:10 to the field.
The clock says 4:29 slower, but the races themselves got 1:19 slower 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 Pro · Women, the one raced most; every comparison is in the list below.
Every race
9 races · 7 events
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Manchester21 Jan 2026Doubles Open · Mixed59:3422/824Beat 97%
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Manchester21 Jan 2026Individual Pro · Women1:14:1421/146Beat 86%
↑ 91 days after Birmingham 2025 3:10 worse than the field Why ↓Close ↑
4:29 slower on the clock in a race that was 1:19 slower for everyone: 3:10 lost to the field.
The fieldCompare these two →1:19 slower This athlete4:29 slower -
Poznan13 Dec 2025Doubles Pro · Women1:02:08 PB3/91Beat 97%
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Birmingham22 Oct 2025Doubles Open · Mixed59:06 PB9/312Beat 97%
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Birmingham22 Oct 2025Individual Pro · Women1:09:45 PB14/141Beat 90%
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London3 May 2025Individual Open · Women1:08:01 PB17/1368Beat 99%
↑ 99 days after Manchester 2025 0:01 worse than the field Why ↓Close ↑
4:11 faster on the clock, and the race was 4:12 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →4:12 faster This athlete4:11 faster -
Glasgow12 Mar 2025Doubles Open · Mixed1:15:11270/841Beat 68%
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Manchester24 Jan 2025Individual Open · Women1:12:1228/539Beat 95%
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World ChampionshipsDate unknownIndividual Pro · Women1:11:51159/470Beat 66%