Cohort progression — Swim Team Lucerne
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 butterfly100 freestyle200 freestyle100 backstroke50 backstroke100 butterfly100 breaststroke50 breaststroke200 medley400 freestyle200 backstroke200 breaststroke200 butterfly400 medley800 freestyle25 freestyle1500 freestyle