Cohort progression — Simklubben Nereus
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 breaststroke100 freestyle50 butterfly50 backstroke100 breaststroke100 backstroke100 medley100 butterfly200 medley200 freestyle200 breaststroke25 butterfly400 freestyle200 backstroke25 freestyle200 butterfly25 breaststroke25 backstroke75 medley
Cohorts to compare: 2018 32017 122016 142015 112014 232013 312012 182011 112010 152009 52008 161988 31980 5
50 m freestyle men · 25 m pool
X: swimmer age in season · Y: median season-best time
born 2018 born 2017 born 2016 born 2015