Cohort progression — Idrætsforening Jarl, Arden
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 freestyle100 medley50 backstroke50 breaststroke50 butterfly200 freestyle100 backstroke100 breaststroke200 medley200 breaststroke
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2013 born 2011