Cohort progression — UKS MOS Opole
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 backstroke100 backstroke200 freestyle200 backstroke100 butterfly50 breaststroke50 butterfly100 breaststroke200 butterfly200 breaststroke400 freestyle100 medley200 medley400 medley