Cohort progression — UKS KRAKEN 227 Warszawa Włochy
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 backstroke100 freestyle100 backstroke100 breaststroke50 breaststroke50 butterfly100 medley100 butterfly25 freestyle25 backstroke200 freestyle200 medley
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015