Cohort progression — KP Raw-Swim
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 butterfly100 breaststroke50 breaststroke50 backstroke100 backstroke100 butterfly200 freestyle200 backstroke100 medley200 medley200 breaststroke400 freestyle25 freestyle25 backstroke
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2013 born 2012