Cohort progression — Schwimmclub Region Bremgarten
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 freestyle50 backstroke100 backstroke200 freestyle50 breaststroke50 butterfly100 breaststroke100 butterfly400 freestyle200 breaststroke200 medley200 backstroke200 butterfly800 freestyle