ZAC Healey has never run more than 10 kilometres.
But next year the Launceston General Hospital support officer will team up with at least four colleagues to run 250 kilometres across the dunes of the Simpson Desert.
Mr Healey said he and three nurses - Shauna Williams, Maddison Baxter and Fiona Hazel - had started training under the guidance of hospital aide and cleaner Jason Beck in preparation for the July 2014 fund-raising event.
"It was my idea because I'm trying to get back in shape, but I'm feeling a bit nervous ... just because I've never done anything like this before," Mr Healey said.
"I'm hoping to complete the whole thing, but it depends on how the training goes."
Mr Beck said he aimed to do the whole race, while the three nurses opted to each do one 10-kilometre section each day.
"It goes for six days, so on the first three days you do a marathon each day, on the fourth day you do a 31-kilometre run, then you do a double marathon on the fifth day, and eight kilometres at the end," Mr Beck said.
He said they would traverse 1000 of the Simpson Desert's 1300 sand dunes.
"I'm feeling OK about it, but then I found out they're the longest sand dunes in the southern hemisphere, so it's a little intimidating," Mr Beck said.