Cohort progression — UMKS Jedynka Zabrze
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 backstroke100 medley100 freestyle100 backstroke100 breaststroke50 breaststroke50 butterfly200 freestyle200 medley100 butterfly200 backstroke200 breaststroke400 freestyle25 freestyle25 backstroke800 freestyle
Cohorts to compare: 2011 202010 172009 142008 132007 202006 222005 162004 252003 252002 252001 212000 201999 221998 12
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2011 born 2009 born 2008