Cohort progression — KS Masters Polkowice
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 breaststroke50 backstroke100 breaststroke100 freestyle100 medley200 backstroke200 breaststroke100 backstroke50 butterfly200 freestyle400 freestyle200 medley800 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1949 born 1946