Cohort progression — Klippans Simsällskap
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 butterfly50 backstroke100 freestyle100 breaststroke100 medley100 backstroke100 butterfly200 medley200 freestyle200 breaststroke200 backstroke25 freestyle400 freestyle25 butterfly25 breaststroke25 backstroke200 unknown400 medley
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2014