Cohort progression — Asociatia Clubul sportiv de inot Resita 07
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 backstroke50 breaststroke50 freestyle100 breaststroke100 freestyle100 backstroke200 breaststroke50 butterfly
Cohorts to compare: 1952 3