The running enthusiast, who is part of Illawarra's Seacliff Coasters group, was challenged on Facebook to undertake an ultra run at home. The target? 360km.

While many people spent their Easter break relaxing, Redfern undertook the challenge over four days... in his Engadine garage.

The course was a 32.5-metre loop, with Redfern completing more than 11,000 laps. He ran 90km each day and ended up running for more than 48 hours.

Redfern said a big part of the challenge was trying to keep things interesting.

"A lot of people have asked 'how did you get through that without feeling bored or unmotivated'? But I actually quite enjoyed it. I didn't get bored at any one time," the 48-year-old said.

"I ended up doing a change of direction every 100 laps so my body wouldn't end up getting really tight on one side. It turned out to be a lap change every 20 minutes which allowed me to walk around for a couple of laps, have a bit of nutrition and continue in the other direction. I ended up doing 115 lap changes and there were 450,000 steps taken.

"I didn't look at the big picture of getting through 360 kilometres. My target was 90km every day and then, within that 90, I'd break it into 10km stints with three lap changes - that kept me preoccupied. It was all broken into those little 20 minute stints. It ended up being the biggest run I've ever done... right here in my garage."

2019 has already been a big year for Redfern. In January, he ticked off a major goal by taking on the Hong Kong Four Trails challenge.

"I ran all four of their trails [The MacLehose, Wilson, Hong Kong and Wilson] continuously," Redfern said.

"That was a 300km track race and covered through the different areas of Hong Kong. It was a 54-hour race."

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In the lead-up to his Easter challenge, Redfern took part in a "virtual race" alongside 2500 runners from various countries across the world.

"The race required taking on 6.7km loops on the treadmill or around the suburb," Redfern said.

"I did nice loops around Engadine and I ended up running 100 miles."

Redfern is a self-described "late starter" when it comes to running. He picked up the sport at 42 years of age and never looked back.

"I came from a bushwalking background and had never run in my life," he said.

"It didn't take me long to realise I definitely enjoyed the bigger runs. I stepped up into 100km, 100-mile races and 24-hour events. That's allowed me to represent Australia twice at events around the world."