Valentina Zelyaeva

It's a lot harder to stick to my regime when I'm travelling, so when I'm home, I make sure that when I wake up in the morning, I drink one litre of water with lemon to cleanse my body from the inside, and then I'll have a big jar of vegetable juice.

A lot of my struggles with nutrition date back to my swimming days. I was a super-skinny young girl who would go through hours of intense training. Afterward, I'd be famished, but I had a two-hour trip home before dinner. When I did my hardest workouts, I often ate less; I was too tired to think about food.