Cohort progression — KS Górnik Radlin
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 freestyle50 backstroke50 butterfly100 breaststroke100 backstroke100 medley50 breaststroke100 butterfly200 medley200 freestyle200 backstroke200 breaststroke400 freestyle200 butterfly400 medley800 freestyle
Cohorts to compare: 2015 122014 152013 132012 142011 192010 132009 182008 172007 212006 232005 172004 212003 272002 222001 202000 371999 281998 191997 121996 71995 61993 3
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2013 born 2012