Cohort progression — KAJMAN Połaniec
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 freestyle50 backstroke50 butterfly100 freestyle100 backstroke50 breaststroke100 breaststroke100 butterfly400 freestyle100 medley200 backstroke200 medley200 breaststroke200 freestyle200 butterfly
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2018 born 2016 born 2015