Cohort progression — Red-Fish Neuchâtel
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 butterfly200 freestyle100 backstroke100 butterfly400 freestyle200 backstroke200 medley400 medley50 backstroke50 breaststroke200 butterfly100 breaststroke