Cohort progression — SMS Olsztyn
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 freestyle200 freestyle400 freestyle50 freestyle100 butterfly100 backstroke50 backstroke50 butterfly200 medley50 breaststroke100 breaststroke400 medley200 backstroke200 butterfly200 breaststroke1500 freestyle800 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2006 born 2005