Cohort progression — KS Wisła Puławy
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 breaststroke100 backstroke100 medley200 freestyle200 medley100 butterfly400 freestyle200 backstroke200 breaststroke400 medley200 butterfly800 freestyle1500 freestyle25 freestyle25 backstroke
Cohorts to compare: 2014 122013 122012 182011 162010 252009 122008 192007 152006 212005 232004 232003 222002 112001 172000 41999 51998 81997 91996 71995 31994 51993 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2013 born 2012 born 2011