"The 24-year-old Chanel model, who was previously a UK Size 16, said that she finally felt ready to exercise for the first time since her teens, when she suffered from an eating disorder and became addicted to working out for up to eight hours a day.
She revealed that a difficult break-up had contributed to her decision to embrace a more healthy lifestyle, and a combination of hiking and yoga had helped the weight drop off.
She told NY Magazine: 'In the past, I avoided exercise because it brought back terrible feelings. I wasn’t ready. And I was scared that maybe I was going to be addicted again.
'That’s a fear that goes through your mind, whenever you’re getting over an addiction or a disease like anorexia, yeah, I absolutely was worried.
'But then I guess you could say my life changed in a really drastic way. For one, there was a split-up that I went through that was very difficult, and I thought, “You know what? I need to be in a good place. I need to find me again.”'
Crystal suffered with anorexia for years. I have serious concerns that her eating disorder and exercise addiction may have reared their ugly heads again.