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Close Up - The woman who wants to run the length of NZ

She's done the toughest race in the world - twice - but that's still not enough for Taranaki ultra marathon runner Lisa Tamati.

She's planning the biggest challenge of her life: To run the length of New Zealand in 33 days.

And just so you know, that's the equivalent of running 52 marathons in 33 days.

Corinne ambler talked to Lisa Tamati about what drives her to put her body through such extremes.