Cohort progression — Simklubben Ena
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 breaststroke100 freestyle50 backstroke25 freestyle100 medley50 butterfly25 breaststroke100 breaststroke25 backstroke25 butterfly100 backstroke200 freestyle100 butterfly200 medley200 breaststroke400 freestyle200 backstroke800 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2013