Cohort progression — Sp "Żagańskie Boberki"
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 butterfly50 backstroke100 backstroke50 breaststroke200 freestyle100 breaststroke200 medley100 butterfly400 freestyle100 medley200 breaststroke800 freestyle200 backstroke
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2011