Cohort progression — KKS Włókniarz 1925 Kalisz

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 100 freestyle 50 backstroke 50 butterfly 200 freestyle 100 backstroke 50 breaststroke 100 breaststroke 400 freestyle 100 medley 100 butterfly 200 backstroke 200 medley 200 breaststroke 200 butterfly 25 unknown 800 freestyle 150 freestyle 400 medley

Cohorts to compare: 2017 7 2016 9 2015 4 2014 4 2013 8 2012 11 2011 13 2010 23 2009 25 2008 31 2007 50 2006 10 2005 21 2004 9 2003 18 2002 11 2001 13 2000 3 1999 6

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