Cohort progression — SK Team Sør
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 400 freestyle50 butterfly100 butterfly200 freestyle50 freestyle100 freestyle50 breaststroke200 medley800 freestyle400 medley100 backstroke100 breaststroke50 backstroke200 butterfly100 medley