Cyclist Victoria Pendleton and runner Allyson Felix strolled around "Stella's Gym" with their Olympic medals accessorising pieces from the new range while GB gymnasts went through their routines on the balance beam and trampoline.
Stella McCartney, said: "This collection is about making a statement while you exercise and give you the confidence to shine."
McCartney worked alongside Tracey Anderson, personal trainer to celebrities such as Madonna and Gwyneth Paltrow, to create the range and has appointed Anderson as the official training ambassador to her Adidas line.
Next season's collection is said to be her most comprehensive yet, covering clothes, shoes and accessories for a range of different sport and fitness regimes.