I know some people do—we get emails every day from people who are losing weight with our app, and if that's a goal they have, I’m very happy we’re helping them to achieve it. It's just never happened to me. No, what happened was better: I started to enjoy being in my body. I felt better. I felt good. It is a very different feeling to be in a fat body that is moving a lot to one that hardly moves at all. It feels like love.

I really love my body. It's taken me ages, but I'm there now. I love it in the way you love an old friend, someone who's always there to support you, who tries their hardest to help you do all the things you want to do and asks so little in return . My body is like a waggy-tailed...