Cohort progression — Kajaanin Uimaseura
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 freestyle100 breaststroke50 breaststroke50 butterfly50 backstroke100 backstroke200 medley200 freestyle100 butterfly200 breaststroke400 freestyle100 medley200 backstroke200 butterfly400 medley800 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014