Cohort progression — Svimjifelagið Hellufossur
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 freestyle16 freestyle50 backstroke16 backstroke33 freestyle25 backstroke100 freestyle100 backstroke33 backstroke50 breaststroke25 breaststroke33 breaststroke
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015