Cohort progression — KP Aqua-Swim Nysa
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 50 freestyle50 breaststroke100 freestyle50 butterfly50 backstroke100 breaststroke200 freestyle100 backstroke400 freestyle100 medley200 breaststroke200 medley200 backstroke100 butterfly
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2011 born 2010 born 2008