Cohort progression — GTI - Tune I.F.
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 butterfly50 backstroke100 backstroke100 medley50 breaststroke100 butterfly200 freestyle100 breaststroke200 medley400 freestyle200 backstroke200 breaststroke25 unknown200 butterfly400 medley50 unknown25 butterfly25 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2015 born 2014 born 2013