Cohort progression — UKS "Krośnicka Przystań"
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 butterfly50 backstroke50 breaststroke100 medley200 freestyle100 butterfly200 medley100 breaststroke400 freestyle100 backstroke200 butterfly400 medley200 breaststroke800 freestyle200 backstroke25 unknown25 freestyle1500 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2012 born 2009