Ultra-runner Kim Allan will next week try to run 500km without sleep - inspired by a woman who was paralysed in a fall from a horse.
The 48-year-old mum-of-four from South Auckland plans to run a circuit in the Auckland Domain for more than 80 hours from Thursday to Sunday, in a mission dubbed "Sleepless in Auckland".
It is her second attempt at the female world record held by American Pam Reed, who ran 486km in 2005.
Last year, Allan reached 376km before blistered feet, hallucinations and ultimately falling asleep stopped her mission, which raised $8500 for charity.
Allan says she wants "just one more go" at the challenge.