Cohort progression — St. Olimpijczyk Kraków
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 freestyle25 backstroke25 freestyle50 backstroke100 freestyle50 breaststroke50 butterfly100 backstroke100 medley100 breaststroke200 medley200 freestyle400 freestyle200 backstroke25 breaststroke100 butterfly200 breaststroke25 butterfly800 freestyle200 butterfly
Cohorts to compare: 2018 432017 342016 422015 562014 402013 372012 302011 122010 122009 192008 172007 32005 4
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015