Cohort progression — UKS Piątka Ostrołęka
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 butterfly25 freestyle50 breaststroke100 backstroke100 butterfly25 backstroke100 breaststroke100 medley200 freestyle25 breaststroke25 butterfly200 medley200 butterfly400 freestyle200 breaststroke
Cohorts to compare: 2018 52017 82016 92015 322014 282013 332012 382011 282010 172009 112008 252007 272006 152005 232004 232003 132002 62001 61999 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015