Cohort progression — Masters Bialystok
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 100 freestyle50 freestyle200 freestyle50 butterfly400 freestyle50 backstroke50 breaststroke100 backstroke100 medley200 backstroke100 breaststroke100 butterfly200 medley200 breaststroke800 freestyle400 medley200 butterfly1500 freestyle
100 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 1984 born 1965 born 1963