Cohort progression — Kemin Työväen 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: 50 freestyle100 freestyle50 breaststroke100 breaststroke50 backstroke50 butterfly100 backstroke200 freestyle100 medley100 butterfly200 medley25 freestyle200 breaststroke25 backstroke200 backstroke400 freestyle400 medley25 breaststroke200 butterfly800 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015 born 2014