Cohort progression — Simmis Grani
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 freestyle100 backstroke50 freestyle200 freestyle200 medley100 breaststroke400 freestyle50 backstroke50 butterfly200 backstroke50 breaststroke100 butterfly800 freestyle200 breaststroke400 medley100 medley1500 freestyle200 butterfly25 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2013