Cohort progression — Haminan Uimaseura
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 breaststroke50 freestyle50 breaststroke100 freestyle100 backstroke50 backstroke200 breaststroke200 freestyle50 butterfly200 medley200 backstroke400 freestyle100 butterfly100 medley400 medley800 freestyle
Cohorts to compare: 2009 3