Cohort progression — SMS Warszawa Bielany
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 butterfly200 freestyle50 backstroke100 backstroke100 butterfly200 medley200 backstroke400 freestyle100 breaststroke50 breaststroke200 breaststroke200 butterfly400 medley800 freestyle1500 freestyle
Cohorts to compare: 2010 102009 62008 92007 192006 182005 62004 112003 172002 152001 162000 101999 4
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2008 born 2007