Cohort progression — ACS Universitar USH
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 butterfly50 breaststroke100 freestyle50 backstroke200 freestyle100 breaststroke200 medley100 backstroke400 freestyle200 breaststroke100 butterfly100 medley200 backstroke800 freestyle200 butterfly1500 freestyle