Cohort progression — Azs Umcs Lublin
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 freestyle400 freestyle50 backstroke200 backstroke200 freestyle50 butterfly100 backstroke50 breaststroke100 butterfly100 breaststroke200 breaststroke800 freestyle200 medley400 medley200 butterfly