Cohort progression — ŚUKS Polna 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: 50 freestyle100 freestyle50 breaststroke50 butterfly50 backstroke100 breaststroke200 freestyle200 breaststroke100 butterfly100 backstroke200 medley
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2007 born 2005