Cohort progression — Svimjifelagið Reysti
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 freestyle50 backstroke100 freestyle50 breaststroke25 backstroke33 freestyle50 butterfly16 freestyle100 backstroke33 backstroke25 breaststroke100 medley100 breaststroke16 backstroke33 breaststroke
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2018 born 2016 born 2015