Sounds a bit fancy for an Aussie farmboy, former shearer .. I looked it up and he more or less moves at that pace anyway - maybe due to being in the navy and having had to march (for a short stint, then five years in engine rooms) - but most likely because we've always walked a lot to get places and why waste the time going slow.

He's still pretty active, he maintains sections of the Bibbulmun Track (1,000 km walking track here in the lower corner of the state) shovels the odd few tonnes of manure, splits wood by hand, etc.