Progress against the field
Between Acapulco 2025 and Mexico City 2026, Janeth Romero Arenas lost 12:40 to the field.
The clock says 9:06 slower, but the races themselves got 3:34 quicker for everyone.
The longest gap between two races compared here, 230 days between Cancun 2026 and Mexico City 2026, still ended 3:38 ahead of 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.
Every race
7 races · 7 events
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Mexico City29 Oct 2026Individual Open · Women1:56:03787/1301Beat 40%
↑ 230 days after Cancun 2026 3:38 better than the field Why ↓Close ↑
6:57 faster on the clock, and the race was 3:19 faster for everyone, so 3:38 of it was this athlete.
The fieldCompare these two →3:19 faster This athlete6:57 faster -
Acapulco4 Sep 2026Doubles Open · Mixed1:32:53 PB139/201Beat 31%
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Cancun13 Mar 2026Individual Open · Women2:03:00429/578Beat 26%
↑ 34 days after Guadalajara 2026 8:24 worse than the field Why ↓Close ↑
8:24 behind the field: 7:04 slower on the clock, against 1:20 faster for everyone.
The fieldCompare these two →1:20 faster This athlete7:04 slower -
Guadalajara7 Feb 2026Individual Open · Women1:55:56462/661Beat 30%
↑ 92 days after Mexico City 2025 8:32 worse than the field Why ↓Close ↑
8:32 behind the field: 6:41 slower on the clock, against 1:51 faster for everyone.
The fieldCompare these two →1:51 faster This athlete6:41 slower -
Mexico City7 Nov 2025Individual Open · Women1:49:15333/664Beat 50%
↑ 62 days after Acapulco 2025 0:38 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
2:18 slower on the clock in a race that was 2:56 slower for everyone: 0:38 gained on the field, which the clock hides.
The fieldCompare these two →2:56 slower This athlete2:18 slower -
Acapulco6 Sep 2025Individual Open · Women1:46:57 PB281/398Beat 29%
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Monterrey5 Apr 2025Doubles Open · Mixed1:40:52323/388Beat 17%