Cohort progression — Stowarzyszenie Akademia Sportu MŁODE ORŁY
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 breaststroke100 breaststroke50 backstroke100 backstroke100 medley
Cohorts to compare: 2010 3