Cohort progression — Klub plaveckých sportů Ostrava
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 freestyle50 butterfly100 backstroke50 backstroke100 butterfly200 freestyle50 breaststroke100 medley
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2008 born 2007 born 2006