Cohort progression — Gimnazjum TWP Ciechanów
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 backstroke
Cohorts to compare: 2001 3
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.