Cohort progression — Denmark
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 freestyle200 freestyle200 medley100 breaststroke100 backstroke400 freestyle50 backstroke200 backstroke200 breaststroke50 butterfly400 medley50 breaststroke100 butterfly
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2008 born 2007