Cohort progression — UKS SP 64 Osowa Góra Bydgoszcz
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 breaststroke25 backstroke25 freestyle100 freestyle100 backstroke100 breaststroke50 butterfly200 medley100 medley400 freestyle200 backstroke200 breaststroke200 freestyle25 breaststroke100 butterfly800 freestyle25 unknown25 butterfly
Cohorts to compare: 2018 182017 172016 282015 192014 182013 212012 202011 192010 232009 142008 42007 132006 11
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2017 born 2016 born 2015