Cohort progression — Swimming Team
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 butterfly200 freestyle100 freestyle200 medley50 backstroke50 breaststroke100 backstroke100 butterfly400 freestyle100 breaststroke200 backstroke100 medley200 butterfly200 breaststroke800 freestyle1500 freestyle