Cohort progression — Norrköpings Kappsimningsklubb
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 breaststroke100 freestyle50 butterfly50 backstroke100 breaststroke100 backstroke200 freestyle100 medley100 butterfly200 breaststroke200 medley400 freestyle25 freestyle200 backstroke25 butterfly25 backstroke25 breaststroke200 butterfly800 freestyle
Cohorts to compare: 2016 72015 142014 232013 192012 252011 122010 242009 132008 72007 82006 52005 32003 32002 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2013