Cohort progression — Klub Sportowy Posnania
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 freestyle200 medley50 butterfly800 freestyle200 freestyle100 breaststroke50 backstroke100 backstroke100 freestyle50 breaststroke200 breaststroke400 freestyle200 backstroke100 butterfly
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1998