Seven marathons in seven days.
That's about 300 kilometres in one week .
While to most people the idea of running a marathon every day for a week sounds horrifying, Elderslie's Katherine Odgers is "not worried about the physical side of things at all".
The personal trainer is gearing up to complete the gruelling Bravehearts 777 Marathon next month - where each of the seven marathons is run in a different Australian state or territory - to raise funds and awareness for the child sexual abuse charity.
Competing in the 777 Marathon has become almost a rite of passage for the Odgers family, with Katherine's brother and sister both giving the event a go in recent years.
She's determined to not let the team down.
"My brother did it in 2015 and he got through three marathons but he hurt his knee and couldn't finish all of them," Ms Odgers said.
"My sister did it in 2017 and finished all seven of them though. I'm not worried about finishing - I'm sure I can do it.
"My family's already raised about $40,000 for Bravehearts and I want to build on that."
Ms Odgers said she decided to take part in the event because she had heard how vital organisations like Bravehearts were in breaking the cycle of abuse.
"A few of my adult clients have told me their stories of being victims of sexual assault from childhood," she said.
"They have said that they had no support from a charity like Bravehearts [when they were young] and they believe that if they had, their lives during the hard times could have been a lot easier for not only themselves but their families as well.
"I think this marathon is the best thing I can do to support Bravehearts."
The CrossFit Narellan trainer said she was now running about eight to 20 kilometres a day in preparation to build up her stamina ahead of the event.
She said she was confident her preparations would see her through all seven marathons.
"I've got two really good pairs of joggers that I will alternate each day," Ms Odgers said.
"Because I've been doing so much running I've built my feet up and I don't really get blisters anymore."
Ms Odgers has currently raised almost $10,000 of her $15,000 goal.
The event kicks off in Perth on July 1. To make a donation, Google 'Kiff Odgers Bravehearts 777 Marathon'.
I'm not worried about finishing - I'm sure I can do it.Katherine Odgers