Cohort progression — Kankaanpään Uimarit
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 backstroke100 breaststroke50 backstroke50 breaststroke50 butterfly200 medley200 freestyle100 butterfly400 freestyle200 backstroke200 breaststroke100 medley800 freestyle200 butterfly
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2013 born 2012