For many triathletes, completing an Ironman is the ultimate test of endurance - swimming 3.86km (2.4 miles), riding 180.25km (112 miles), running 42.195km (26.2 miles).

Some athletes are talented enough to then qualify for the Ironman World Championships in Hawaii - the Mecca of triathlons.

Fewer still dare to attempt the Ultraman - a double Ironman over three days.

Only a handful of humans have attempted the Epic 5 Challenge - five Iron distance triathlons, over five days, on five Hawaiian islands.

Then there is Craig Percival..

Who in March 2016 completed the 8-in-8-in-8 (8 full Iron distance triathlons, in 8 of Australia's states and territories, in 8 consecutive days).

In this interview Craig talks about what he went through and what kept him going.

Links mentioned in this episode:

* No Limits Endurance

* 8 Ironmans in 8 Days around Australia (Facebook)

* Craig Percival (Twitter)

* Craig Percival (Instagram)

Enjoy the interview.