Cohort progression — MKP H2O Koszalin
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 backstroke50 butterfly50 breaststroke100 medley200 freestyle100 breaststroke100 backstroke200 medley400 freestyle100 butterfly25 freestyle200 breaststroke25 backstroke200 backstroke200 butterfly25 breaststroke800 freestyle1500 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2007 born 2006 born 2005