Simon Prout gritted his teeth and heaved the ore-laden wheelbarrow over the finish line.
He had endured extreme heat and fatigue to complete Port Hedland's 122km charity wheelbarrow race, the Blackrock Stakes, but it had come at a cost.
The Royal Flying Doctor Service flew Mr Prout to Perth. He had emergency treatment for acute renal failure caused by rhabdomyolysis, when damaged skeletal muscle leaks protein.
That service after his harrowing experience 10 years ago is one of the reasons the Floreat medical professional devotes much of his spare time to volunteering.
Next month, he will again test his limits for charity when he climbs the highest mountain outside Asia - Argentina's Aconcagua - for Perth-based, not-for-profit Community Mates. Just one year since its inception, Community Mates has chapters around the globe linking people to volunteer organisations.
Mr Prout, 35, who has been training hard with his one-year old French bulldog Ebz, said he supported the group's approach of donating time over money.
Visit www.facebook.com/communitymates .