Cohort progression — Sandnes 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 butterfly100 freestyle50 freestyle200 freestyle100 backstroke100 breaststroke50 breaststroke50 backstroke200 medley200 breaststroke200 backstroke100 butterfly400 freestyle200 butterfly400 medley800 freestyle