Cohort progression — SMS Warszawa
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 freestyle200 freestyle50 butterfly400 freestyle100 butterfly100 backstroke50 backstroke100 breaststroke50 breaststroke200 backstroke200 breaststroke200 medley200 butterfly400 medley800 freestyle1500 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2002 born 2001 born 2000