Pippa Middleton, who wowed the world at her sister Kate's wedding to Prince William with her shapely butt, has revealed the secret behind her toned rear - British Military Fitness classes run by ex-Forces trainers.
The 30-year-old beauty wrote in Waitrose Kitchen magazine that she is a Military Fitness obsessive, the Daily Star reported.
It is believed that the fitness instructors conduct exhausting exercises in public parks, including the Hyde Park and Battersea Park, which are closest to Pippa's London home.
