Cohort progression — MKS Piaseczno
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 backstroke50 breaststroke50 butterfly200 freestyle200 medley200 breaststroke100 butterfly100 medley200 backstroke400 freestyle800 freestyle400 medley200 butterfly25 freestyle1500 freestyle25 backstroke
Cohorts to compare: 2016 62015 182014 232013 202012 162011 202010 132009 292008 222007 142006 192005 242004 322003 222002 52001 152000 61999 71998 51997 5
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2013