Cohort progression — 3-WODNIK Wolsztyn
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 freestyle100 medley50 breaststroke50 butterfly100 backstroke100 breaststroke200 freestyle200 backstroke200 breaststroke100 butterfly200 medley
Cohorts to compare: 2013 132012 92011 102010 112009 82008 132007 222006 142005 92004 92003 82002 52001 5
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2012 born 2011 born 2010