Cohort progression — Szansa Start Gdańsk
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 100 freestyle50 freestyle50 backstroke100 backstroke100 breaststroke200 freestyle400 freestyle50 breaststroke50 butterfly200 medley100 butterfly
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2012 born 2011