Cohort progression — ZS 27 UKS "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 freestyle100 freestyle50 butterfly50 backstroke100 backstroke200 backstroke50 breaststroke100 breaststroke200 freestyle100 medley100 butterfly200 medley200 breaststroke400 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2004 born 2002