Cohort progression — Wodnik Radom
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 backstroke50 butterfly100 freestyle50 breaststroke100 breaststroke100 backstroke100 medley100 butterfly200 medley200 freestyle400 freestyle200 breaststroke200 backstroke25 freestyle25 backstroke400 medley200 butterfly
Cohorts to compare: 2018 32017 172016 42015 252014 252013 132012 72011 52010 142009 82008 62007 32006 82005 42003 472001 61999 51998 131997 31996 41995 7
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015