Cohort progression — Åstveit SK
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 freestyle100 freestyle50 butterfly50 backstroke50 breaststroke200 freestyle200 medley100 backstroke400 freestyle100 breaststroke200 backstroke100 butterfly200 breaststroke800 freestyle100 medley
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2013 born 2012