Cohort progression — MASTERS Zdzieszowice
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 100 medley50 butterfly100 butterfly100 backstroke200 backstroke200 butterfly200 medley100 freestyle50 backstroke50 breaststroke50 freestyle100 breaststroke400 medley200 breaststroke400 freestyle200 freestyle
100 m medley men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1988 born 1986 born 1979