Cohort progression — Champion Tomaszów Maz.
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 freestyle50 butterfly50 backstroke100 freestyle50 breaststroke100 backstroke100 butterfly100 breaststroke100 medley200 freestyle200 medley200 backstroke25 freestyle25 backstroke25 butterfly400 freestyle200 butterfly200 breaststroke25 breaststroke800 freestyle
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2013