Cohort progression — LUKS Orlik
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 backstroke50 freestyle25 freestyle25 backstroke100 freestyle50 butterfly100 backstroke50 breaststroke100 medley100 breaststroke200 freestyle25 breaststroke
50 m backstroke men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015