Cohort progression — MKS JEDYNKA Łódź
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 freestyle100 freestyle200 freestyle100 breaststroke100 backstroke50 butterfly50 backstroke50 breaststroke400 freestyle200 medley100 butterfly200 backstroke200 breaststroke100 medley200 butterfly400 medley800 freestyle1500 freestyle25 freestyle25 backstroke
Cohorts to compare: 2018 152017 142016 212015 212014 172013 182012 262011 262010 182009 112008 112007 112006 152005 322004 152003 152002 112001 72000 51999 91998 61997 161995 111994 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015