Cohort progression — Plivacki klub Dubrava
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 freestyle50 butterfly50 freestyle50 backstroke100 medley100 breaststroke200 medley400 freestyle200 backstroke50 breaststroke100 butterfly200 breaststroke100 backstroke200 freestyle