Progress against the field
From London Excel 2025 to Cardiff 2026, Leilani Mason got 7:13 faster than the field.
The clock says 9:05 faster, but the races themselves got 1:52 quicker for everyone.
The largest gain on the field came from London Excel 2025 → London Olympia 2026: 6:33 in 110 days.
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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Washington DC3 Sep 2026Individual Open · Women1:17:2528/530Beat 95%
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Cardiff29 Apr 2026Individual Open · Women1:16:40 PB48/646Beat 93%
↑ 36 days after London Olympia 2026 0:40 better than the field Why ↓Close ↑
0:40 better than the field: 1:08 faster on the clock, against 0:28 faster for everyone.
The fieldCompare these two →0:28 faster This athlete1:08 faster -
London Olympia24 Mar 2026Individual Open · Women1:17:4871/758Beat 91%
↑ 110 days after London Excel 2025 6:33 better than the field Why ↓Close ↑
7:57 faster on the clock, and the race was 1:24 faster for everyone, so 6:33 of it was this athlete.
The fieldCompare these two →1:24 faster This athlete7:57 faster -
London Excel4 Dec 2025Individual Open · Women1:25:45594/1542Beat 62%