Cohort progression — SP Żagańskie Boberki Żagań
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 freestyle100 breaststroke50 breaststroke100 medley100 backstroke50 backstroke50 butterfly200 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015 born 2014 born 2011