Cohort progression — Brønderslev SK08
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 backstroke100 medley100 backstroke50 breaststroke50 butterfly100 breaststroke100 butterfly200 medley200 freestyle200 breaststroke200 backstroke400 freestyle400 medley800 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2013 born 2012 born 2011