Cohort progression — ACS Atena Sport Club Constanta
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 freestyle50 butterfly200 freestyle200 medley50 backstroke50 breaststroke100 freestyle100 backstroke100 breaststroke200 backstroke400 freestyle100 butterfly200 breaststroke