Cohort progression — Plavecký klub Nový Jičín
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 freestyle100 backstroke200 freestyle100 breaststroke50 breaststroke100 butterfly50 butterfly100 medley200 medley400 freestyle50 backstroke200 breaststroke200 backstroke200 butterfly400 medley800 freestyle