Cohort progression — KS AZS AGH Kraków
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 butterfly50 freestyle100 backstroke100 freestyle50 backstroke50 butterfly100 breaststroke200 medley200 backstroke200 freestyle50 breaststroke400 freestyle200 breaststroke400 medley100 medley200 butterfly
100 m butterfly men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2007 born 2003 born 2002