Cohort progression — Ognisko TKKF Szczygłowice
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 backstroke50 breaststroke100 freestyle50 butterfly25 backstroke100 medley25 freestyle100 backstroke100 breaststroke200 freestyle25 breaststroke100 butterfly200 medley200 backstroke200 breaststroke25 butterfly400 freestyle400 medley1500 freestyle
Cohorts to compare: 2019 72018 212017 322016 352015 452014 322013 392012 262011 282010 172009 82008 112007 42006 9
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2017 born 2016