Cohort progression — UKS Dwójka Morena Gdańsk
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 freestyle50 backstroke50 breaststroke100 backstroke50 butterfly100 breaststroke100 medley200 medley200 freestyle200 backstroke400 freestyle100 butterfly200 breaststroke25 backstroke25 freestyle800 freestyle200 butterfly25 unknown400 medley
Cohorts to compare: 2018 242017 242016 502015 282014 272013 302012 252011 322010 412009 242008 332007 402006 252005 342004 372003 312002 292001 262000 251999 321998 221997 161996 241994 7
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2017 born 2016 born 2015