Craig Bulloch was doing everything right, exercising and eating well, yet he had a heart attack at the age of 34.
But Mr Bulloch's exercise is more than a jog around the block. He has completed half-ironman events and - having recovered from last February's health scare - he competed in last month's Auckland half-ironman and has entered next month's full-distance NZ Ironman at Taupo.
It was while training for last year's NZ Ironman that he had his heart attack.
"It was 10 days before the ironman. I went out for short runs to make sure everything was going okay. I felt some chest pain. I just thought it was a bit of exhaustion as it was pretty hot. I didn't think anything of it and just kept running. I got home and started speaking to the girlfriend. We decided I should go and see the doctor in the morning.
"Next morning I went to the doctor, had blood tests and they found I had had a heart attack. They ended up putting a stent in [a wire mesh to hold a heart artery open]. There was 75 per cent blockage of an artery.