Cohort progression — UKS "TYTAN-65" przy SP 65 w Bydgoszczy
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 freestyle50 breaststroke100 backstroke100 breaststroke25 backstroke25 freestyle50 butterfly100 medley200 freestyle200 medley400 freestyle200 backstroke100 butterfly200 breaststroke25 butterfly25 breaststroke800 freestyle
Cohorts to compare: 2012 82011 172010 112009 122008 132007 222006 232005 162004 202003 202002 182001 142000 201999 101998 151997 4
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2009