Ms Fisher signed up for an Isle of Wight ultra race, having never taken part in any form of running event before, and after only undertaking 12 weeks of training.
She won that race and said: "Since then my life has just been running.
"There was a lot of moments where I thought 'why am I putting myself through this?'"
The length of the trails means that often she can be alone on the track, she said.
"I had some hours where it's just me and my own brain. Those times can be quite hard," Ms Fisher said.
"It's kind of like a meditational state where my inner monologue is just constantly talking to itself.
"But then sometimes there's just aspects of calm, when I am just focused on the climb or on the descent because it is so difficult and I kind of get that peace."
