Cohort progression — Schwimmclub Schaffhausen
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 butterfly50 breaststroke100 freestyle50 backstroke200 medley100 butterfly200 freestyle100 breaststroke200 breaststroke400 freestyle100 backstroke200 backstroke