Cohort progression — UKS Orka Zamość
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 backstroke50 breaststroke100 breaststroke100 medley200 freestyle100 backstroke100 butterfly200 breaststroke200 medley400 freestyle200 backstroke400 medley200 butterfly800 freestyle25 butterfly25 unknown25 backstroke
Cohorts to compare: 2017 62016 102015 132014 192013 82012 142011 182010 302009 222008 292007 162006 332005 192004 302003 212002 152001 172000 231999 181998 141997 141996 71994 51993 4
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015 born 2014