Cohort progression — KS Posnania
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 freestyle100 breaststroke50 butterfly50 breaststroke400 freestyle200 medley100 backstroke100 butterfly200 breaststroke200 freestyle50 backstroke100 medley200 backstroke800 freestyle200 butterfly
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2005 born 2004 born 2003 born 2002