Cohort progression — Holbæk Svømme Klub
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 butterfly100 medley50 backstroke50 breaststroke100 backstroke200 freestyle100 breaststroke200 medley100 butterfly200 backstroke400 freestyle200 breaststroke200 butterfly400 medley25 backstroke25 freestyle800 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015 born 2014 born 2013