Cohort progression — Kouvolan Uimarit
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 100 freestyle50 freestyle100 breaststroke50 butterfly200 freestyle200 medley100 backstroke50 breaststroke400 freestyle50 backstroke100 butterfly200 breaststroke100 medley200 backstroke800 freestyle50 unknown200 butterfly400 medley100 unknown1500 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2012 born 2011 born 2010