Cohort progression — Swimming Club Vuokatti
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 freestyle50 backstroke100 backstroke100 breaststroke50 breaststroke200 freestyle50 butterfly100 medley400 freestyle200 medley200 backstroke200 breaststroke100 butterfly