Cohort progression — Great Britain
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 90 beach sprintboard race50 manikin carry200 medleyoceanman100 rescue medley200 super lifesaversurf ski racebeach flags100 manikin carry with finssurf race200 freestyle200 obstacle swim100 manikin tow with fins50 freestyle100 freestyle50 backstroke100 backstroke200 backstroke400 freestyle