Cohort progression — Lausanne Aquatique
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 freestyle100 freestyle400 freestyle200 freestyle50 butterfly100 butterfly200 medley50 breaststroke100 breaststroke50 backstroke100 backstroke200 backstroke200 breaststroke400 medley800 freestyle200 butterfly1500 freestyle