Apple posts interview with Christy Turlington Burns on iTunes

The interview consists mostly of Burns discussing her experiences with marathons and fitness in general, as well as her charity Every Mother Counts, which is dedicated to improving the safety of pregnancy and childbirth.

Towards the end of the interview she discusses exercising with the Apple Watch. She notes for example that she never used a fitness tracker prior to the Watch, and that some of the things she enjoyed most were being able to monitor her performance accurately and get constant rewards for progress.

Turlington Burns has been Apple's primary celebrity spokesperson for the Watch. She appeared on-stage during the company's March 9 press event, and contributed a diary to Apple's website praising the product. In exchange for being used in marketing, Turlington Burns has been able to promote her charity.

She ran the London Marathon on Sunday, and yesterday, Apple CEO Tim Cook posted a photo to Twitter showing her after the race with a Watch on her wrist. She beat her personal goal with a time of 3:46:45.

In her final diary update, posted Tuesday, Turlington Burns promoted Watch features like Siri, Maps, and Digital Touch, and described the experience of running the marathon. She also used the opportunity to talk about Every Mother Counts and her new film Every Mile, Every Mother.