Cohort progression — SPK Kupele Piestany
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 breaststroke50 breaststroke200 breaststroke50 butterfly200 medley100 medley50 freestyle200 backstroke
100 m breaststroke men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1972