"It came back saying I was severely depressed and should see someone immediately."
Ms Sandford's doctor sent her to a psychologist for counselling. It was then she decided to try the Coast to Coast again, having withdrawn from a previous race. Training gave her motivation and "something to get up for in the morning".
She finished the 2011 two-day event, albeit bloodied after a bike crash 10km from the finish. But later in the year, she suffered a bad relapse of depression. Desperate, she agreed to try anti-depressants and within two weeks had a huge change in attitude and personality.
"It was as if a massive blind had lifted and there was colour in my world again."
Since then, she has kept her depression under control with medication and training and said getting her problem out in the open had been a huge relief.
"[Before] I was embarrassed to tell people, I didn't want people to think I was weak."
With the support of her family and partner she now knows there is no shame in depression, and wants to encourage others struggling with the disease to get help. "Don't think you have to go through it alone, you really don't."
To sponsor Ms Sandford, go to www.fundraiseonline.co.nz/fionasandford. All money raised goes to LifeLine.