Cohort progression — Schwimmverein St. Gallen - Wittenbach
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 freestyle100 backstroke50 freestyle50 butterfly200 freestyle400 freestyle200 medley50 backstroke200 backstroke400 medley100 butterfly50 breaststroke100 breaststroke