Cohort progression — MKP Astromal-Leszno
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 100 freestyle50 freestyle100 breaststroke100 backstroke50 breaststroke50 butterfly50 backstroke200 breaststroke200 freestyle100 butterfly100 medley200 medley400 freestyle200 backstroke200 butterfly800 freestyle1500 freestyle400 medley
Cohorts to compare: 2015 212014 222013 222012 232011 262010 372009 242008 172007 242006 282005 212004 242003 152002 10
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014 born 2013 born 2012