Cohort progression — Schwimmclub Aarefisch
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 backstroke50 breaststroke50 butterfly100 freestyle100 backstroke200 freestyle100 breaststroke200 backstroke100 butterfly200 medley400 freestyle200 breaststroke800 freestyle25 freestyle