Cohort progression — UKS 307 Warszawa-Mokotów
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 freestyle50 backstroke100 freestyle50 butterfly50 breaststroke100 backstroke100 butterfly400 freestyle100 breaststroke200 freestyle100 medley200 medley200 backstroke200 breaststroke200 butterfly800 freestyle
Cohorts to compare: 2015 132014 82013 142012 72011 82010 122009 32008 142007 102006 62005 172004 152003 102002 72001 61999 5
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2013