They're used to late shifts and early arrivals; now a group of Wollongong Hospital nurses and midwives is gearing up for a new challenge.
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The eight co-workers - who range in age from 26 to 62 - have been busy training for the Oxfam Sydney Trailwalker.
Starting on August 23, they'll walk 100km - from Brooklyn on the Hawkesbury River to Sydney Harbour.
"The Oxfam event is now in its 20th year, raising millions of dollars to provide those in poverty with basic needs like clean water, food and clothing and education," participant Helen Livissianos said.
"It's a pretty gruelling track and we'll be walking through the night but we're all used to working nights and dealing with stressful situations."
Joining Ms Livissianos will be Lorraine Hince, Prue Mayers, Liz Loft, Samantha King, Haley Findlay, Krystal McKenna and Jessica Barnes.
The women - who all work at the hospital's C2West maternity unit - are grouped in two teams of four, with each team already raising over $2000 for the charity.
"It's a great team-building experience - and it's also good for our physical and mental health," Ms Livissianos said.
More than 700 teams are set to take part in this year's Oxfam Sydney.
To support the Wollongong nurses, go to the event site and search for teams 'Sea To West' and 'Sea To West 2'.