Cohort progression — Söderhamns Simsällskap
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 freestyle50 backstroke100 freestyle50 breaststroke50 butterfly200 freestyle100 backstroke100 medley400 freestyle100 butterfly100 breaststroke200 medley200 backstroke25 freestyle200 breaststroke800 freestyle200 butterfly400 medley1500 freestyle25 breaststroke
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014