Cohort progression — MKS ,,Astoria'' Bydgoszcz
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 freestyle100 backstroke200 freestyle400 freestyle100 breaststroke50 breaststroke50 butterfly100 butterfly200 backstroke50 backstroke200 medley200 breaststroke100 medley400 medley200 butterfly800 freestyle1500 freestyle25 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2010 born 2008 born 2007 born 2006