Cohort progression — Trondhjems 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 freestyle50 butterfly50 backstroke50 breaststroke100 backstroke100 breaststroke200 freestyle100 butterfly200 medley200 breaststroke400 freestyle200 backstroke400 medley