Cohort progression — Schwimmklub Bern
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 butterfly100 backstroke100 breaststroke100 butterfly50 breaststroke200 freestyle50 backstroke200 medley400 freestyle200 breaststroke400 medley200 backstroke200 butterfly25 freestyle800 freestyle1500 freestyle