Cohort progression — Društvo Plavalna akademija KURENT
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 breaststroke100 breaststroke100 freestyle50 butterfly50 backstroke200 freestyle200 breaststroke200 medley100 butterfly25 backstroke25 breaststroke25 freestyle200 backstroke400 freestyle