12:20Gym StarsSeries 3Leaving Your Comfort ZoneCBBC Duration: 22 minutes Tue 21st Jul 2020, 12:20 on CBBC HDThere’s a new Gym Star in the making - nine-year-old Kosei! Show more GenresChildren'sFactualChildren'sSportBrandGym StarsSeriesGym Stars: Series 3 Source: BBC Online