Cohort progression — Kalevi Ujumiskool

Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.

Sex: WomenMen Pool: 25 m pool50 m pool

Event: 50 freestyle 50 butterfly 50 breaststroke 50 backstroke 100 freestyle 100 breaststroke 100 backstroke 200 freestyle 200 breaststroke 200 medley 100 butterfly 200 backstroke 400 medley 400 freestyle 200 butterfly 800 freestyle 100 medley

Cohorts to compare: 2014 16 2013 5 2012 10 2011 10 2010 11 2009 19 2008 10 2007 7 2006 8 2005 5 2004 10 1999 3

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