Cohort progression — Ognisko TKKF DELFIN Tarnów
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 butterfly100 butterfly100 freestyle200 freestyle400 freestyle50 breaststroke800 freestyle100 medley200 medley50 backstroke100 backstroke
Cohorts to compare: 2015 3