Natalie Cassidy said training for a marathon helped her shed several stone.
The EastEnders actress has recently dropped three stone, going from a size 16 to a size eight. Natalie admitted she feels a lot more confident about herself after learning "how to eat properly" but it wasn't an easy goal to achieve.
In 2009, she released her own fitness DVD, titled Then and Now, but soon became obsessed with her weight and appearance. Speaking to Heat Magazine at the time, she said: "I really wasn't well. I was bordering on having an eating disorder.