Cohort progression — MKS Dziewiątka 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 breaststroke100 backstroke100 breaststroke100 butterfly100 medley200 freestyle200 medley200 backstroke200 breaststroke400 freestyle200 butterfly50 unknown
Cohorts to compare: 2015 32014 102013 52012 82011 52010 132009 32008 102007 52006 112005 52004 52003 52001 52000 91998 31977 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2012