Cohort progression — RWKS SPARTA Biłgoraj
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 breaststroke50 butterfly100 backstroke100 medley200 medley200 freestyle200 breaststroke100 butterfly200 backstroke400 freestyle25 backstroke25 freestyle25 breaststroke25 butterfly200 butterfly800 freestyle
Cohorts to compare: 2018 142017 222016 122015 282014 192013 242012 232011 32010 82009 232008 172007 362006 242005 312004 202003 272001 162000 31999 141998 14
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015