Cohort progression — Aalesunds SLK
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 freestyle100 freestyle200 freestyle50 breaststroke200 backstroke50 butterfly200 breaststroke100 breaststroke200 medley50 backstroke400 freestyle100 backstroke100 butterfly200 butterfly