Cohort progression — Marlin Żywiec
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 50 backstroke50 freestyle50 breaststroke100 freestyle50 butterfly25 backstroke25 breaststroke100 medley25 freestyle
50 m backstroke men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2014