Cohort progression — Łódzki Okręgowy Związek Pływacki

Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.

Sex: WomenMen Pool: 25 m pool50 m pool

Event: 50 butterfly 200 medley 400 medley 50 freestyle 100 butterfly 400 freestyle 200 butterfly 100 medley 50 backstroke 100 backstroke 100 breaststroke 200 freestyle 800 freestyle 200 backstroke 50 breaststroke 100 freestyle 200 breaststroke

Cohorts to compare: 2001 5 2000 12 1999 7 1997 5 1996 5 1995 4 1994 5

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