Cohort progression — MKS 9 Dzierżoniów
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 butterfly100 freestyle50 backstroke50 breaststroke200 freestyle100 breaststroke100 butterfly100 backstroke100 medley400 freestyle200 medley200 breaststroke200 backstroke200 butterfly25 freestyle25 backstroke400 medley25 unknown800 freestyle
Cohorts to compare: 2011 52010 102009 32008 62007 62006 62005 42004 102003 102002 62001 72000 151998 91997 61995 31994 5
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2010 born 2008