Cohort progression — Solna Sundbyberg SS 04
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 butterfly50 breaststroke50 backstroke100 breaststroke100 backstroke200 freestyle100 butterfly100 medley200 medley200 breaststroke400 freestyle200 backstroke200 butterfly800 freestyle25 butterfly400 medley25 freestyle25 backstroke
Cohorts to compare: 2015 162014 132013 222012 252011 252010 272009 302008 222007 112006 82005 122004 82002 82001 61998 31996 41985 31974 31970 3
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2013 born 2012