Cohort progression — Kaliski Klub Sportowy ,,Włókniarz'' 1925 Kalisz
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 backstroke50 butterfly200 freestyle100 backstroke50 breaststroke400 freestyle100 butterfly100 breaststroke200 backstroke200 medley100 medley200 breaststroke200 butterfly800 freestyle400 medley
Cohorts to compare: 2017 72016 102015 62014 82013 162012 162011 162010 212009 142008 152007 172006 82005 72004 42003 72002 6
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015 born 2014