Cohort progression — MTP Lublinianka Lublin
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 400 freestyle50 freestyle100 backstroke200 medley200 backstroke50 backstroke400 medley200 freestyle100 freestyle50 butterfly50 breaststroke800 freestyle100 butterfly100 breaststroke200 breaststroke200 butterfly100 medley1500 freestyle