Cohort progression — Göteborg Sim
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 breaststroke50 backstroke50 butterfly100 breaststroke200 freestyle100 backstroke100 butterfly100 medley200 medley400 freestyle200 breaststroke200 backstroke800 freestyle25 butterfly200 butterfly25 freestyle1500 freestyle400 medley
Cohorts to compare: 2015 42014 162013 152012 282011 182010 182009 142008 182007 62006 42005 52004 32003 31993 41976 41974 31957 5
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2013 born 2012