Cohort progression — MKS MOS Katowice
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 butterfly50 breaststroke100 breaststroke50 backstroke100 medley100 backstroke100 butterfly200 breaststroke200 medley200 freestyle200 backstroke400 freestyle200 butterfly25 freestyle25 backstroke400 medley25 breaststroke800 freestyle
Cohorts to compare: 2017 42016 142015 112014 192013 152012 162011 72010 112009 292008 112007 172006 242005 182004 292003 232002 522001 192000 331999 231998 81997 101996 101995 91994 111993 41992 4
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014