Cohort progression — AZS UŁ PŁ Łódź
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 butterfly100 freestyle100 butterfly50 breaststroke50 backstroke200 freestyle100 medley100 breaststroke200 medley100 backstroke200 butterfly200 breaststroke400 freestyle400 medley200 backstroke
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2005 born 2000 born 1999 born 1996