Cohort progression — KP Stilon Gorzów Wlkp.
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 butterfly50 freestyle100 freestyle50 butterfly200 freestyle200 butterfly200 medley100 medley100 breaststroke50 backstroke100 backstroke50 breaststroke200 backstroke400 freestyle
100 m butterfly men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2003 born 2000