Cohort progression — Dragsholm Svømmeklub
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 breaststroke50 backstroke200 freestyle25 freestyle100 backstroke100 breaststroke100 butterfly400 freestyle200 medley25 backstroke200 breaststroke25 butterfly200 backstroke
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2012 born 2011 born 2010 born 2009