Cohort progression — TKKF Koszalin Masters
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 breaststroke100 freestyle100 medley50 butterfly100 breaststroke50 backstroke100 backstroke200 backstroke200 freestyle200 medley400 freestyle200 breaststroke800 freestyle400 medley100 butterfly1500 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1987 born 1979