Cohort progression — MZOS Płock
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 breaststroke100 medley100 backstroke100 butterfly50 butterfly200 medley200 freestyle400 freestyle
Cohorts to compare: 2015 162009 42008 142007 212006 362005 292004 492003 212002 452001 512000 581999 351998 411997 121996 41995 51994 61993 31992 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2008