Cohort progression — Uks Delfin Legionowo
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 breaststroke100 breaststroke100 freestyle50 butterfly50 backstroke100 backstroke200 breaststroke100 medley200 freestyle100 butterfly200 medley200 backstroke400 freestyle25 freestyle25 backstroke
Cohorts to compare: 2012 52011 112010 42009 32008 72007 72006 32005 132004 52003 182002 162001 152000 111999 91998 131997 71996 61986 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2012 born 2011 born 2010 born 2009