Dr Devany has been warning of this risk of death for a long time.
http://www.arthurdevany.com/articles/20110531
Sadly, we have a triathlon death to report from the Greely Tribune. And, just this morning I met my Marine buddy who has been doing triathlons for the past 5 years. I was simply shocked at the way he looked, there is no other way to describe it.
The start of a triathlon is among the most dangerous parts of the race. Plunging into cold water in the morning with a hundred or more other competitors thrashing in the water is confusing and panic inducing. It is likely, this young doctor had a heart condition; which, being a doctor there is no excuse for. An existing condition is not so difficult to spot and for a doctor to risk his life and his family's welfare without checking is hard for me to understand. Alas, we all think we are invulnerable.
My Marine friend is described in my book; when I met him he was leather-tough looking, trim, tall, and tan. Just the way a Marine ought to be, though he is a retired one. He began triathlons a short while after I moved into my community. Within a year he was limping most of the time and had lost his tan---he had gone over to indoor training on the treadmills and stationary bikes.
A few years later, he had a heart attack on a training ride. He was pretty far from home and lucky someone stopped and got an ambulance out.
Dr DeVany has been warning of this for years.
Now, he had a massive fall in his last triathlon and severely damaged his right shoulder. He had extensive surgery done and a titanium rod put in. Today, he is a stooped over, greyed, emasciated old man. He looks at least 20 years older and still has that limp.
His smile, and once-firm handshake are gone.
The Newspaper Report http://www.independent.co.uk/life-style/health-and-families/health-news/warning-over-triathlon-death-rate-1690626.html
And it is not running that is the problem...it is the endurance events and training that are the problem. The Quilt says up to 400 meters only....or a 5k run but no more.