Cohort progression — Ystads Simsällskap
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 breaststroke50 butterfly100 backstroke100 breaststroke100 butterfly200 freestyle100 medley200 medley200 backstroke200 breaststroke400 freestyle200 butterfly800 freestyle400 medley25 butterfly1500 freestyle200 unknown
Cohorts to compare: 2015 42014 52013 82012 162011 102010 72009 102008 112007 42006 62005 52001 31999 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2013 born 2012