Cohort progression — Ks Assa
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 freestyle100 breaststroke50 freestyle50 breaststroke200 freestyle50 butterfly100 backstroke200 medley50 backstroke100 butterfly100 medley200 breaststroke200 backstroke400 freestyle200 butterfly25 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2013 born 2012