It's all about the journey - and Mat Grills has had many, and has more to come. His next adventure is to run across Australia - 100km for 50 days - along the way, encouraging people to try a vegan lifestyle or commit to their own health or fitness challenge.
This is the first of our two-part chat with Mat, with the second (and final) part released next week.
To find out more about Mat and his adventures and activism, head to www.thetattoorunner.com
For further information about Ocean Protect, check us out at www.oceanprotect.com.au
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