Cohort progression — WKS ŚLĄSK Wrocław
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 freestyle200 freestyle50 butterfly400 freestyle200 medley100 butterfly100 backstroke100 breaststroke50 breaststroke50 backstroke100 medley200 backstroke200 breaststroke400 medley200 butterfly800 freestyle1500 freestyle50 unknown
Cohorts to compare: 2015 302014 292013 292012 292011 242010 482009 232008 232007 362006 412005 422004 312003 402002 462001 542000 461999 491998 431997 471996 211995 371994 281993 351992 51991 111990 61975 31968 4
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2013 born 2012