Cohort progression — Nyköpings 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 breaststroke100 freestyle50 backstroke50 butterfly100 medley200 freestyle25 breaststroke100 breaststroke25 freestyle100 backstroke400 freestyle100 butterfly25 butterfly200 medley25 backstroke200 backstroke800 freestyle200 breaststroke400 medley
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014