Cohort progression — Uks Delfin Masters Tarnobrzeg
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 butterfly100 freestyle100 breaststroke200 freestyle100 medley50 backstroke200 medley100 butterfly200 breaststroke400 freestyle100 backstroke200 butterfly200 backstroke800 freestyle400 medley1500 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1975 born 1974 born 1972