Cohort progression — IUKS Jedynka Poznań
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 backstroke100 freestyle50 breaststroke100 breaststroke100 backstroke50 butterfly100 medley25 backstroke200 medley400 freestyle25 freestyle200 freestyle100 butterfly200 breaststroke200 backstroke
Cohorts to compare: 2018 212017 262016 252015 222014 362013 412012 312011 372010 362009 382008 442007 242006 202005 282004 232003 212002 262001 211998 4
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2016 born 2015