Cohort progression — Buks
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 backstroke50 breaststroke100 breaststroke50 butterfly100 backstroke100 butterfly100 medley200 medley200 freestyle200 breaststroke200 backstroke400 freestyle25 freestyle25 backstroke25 butterfly25 breaststroke400 medley800 freestyle
Cohorts to compare: 2017 262016 282015 222014 212013 232012 212011 272010 142009 122008 222007 242006 242005 82004 262003 272002 282001 251999 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2017 born 2016 born 2015 born 2014