Cohort progression — Haukiputaan Heitto uintijaosto
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 breaststroke100 breaststroke50 backstroke50 butterfly100 backstroke200 medley200 freestyle100 medley100 butterfly200 breaststroke400 freestyle200 backstroke25 freestyle200 butterfly800 freestyle400 medley25 backstroke25 breaststroke
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2013 born 2012