Cohort progression — Vallensbæk IF Af 1939
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 100 freestyle50 freestyle50 butterfly50 breaststroke50 backstroke100 backstroke100 medley100 breaststroke200 freestyle100 butterfly200 medley200 breaststroke200 backstroke400 freestyle200 butterfly400 medley25 butterfly25 unknown25 freestyle800 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015 born 2014 born 2013