He showed everyone how to do it right: first swim 3.8K and bike 180K moderately hard, but not too hard, and take in all the nutrition you can. Then run a 2:45 marathon. It's as simple as that.
Here's a pre-race interview, showing how relaxed Alexander the Great was.
By the way, Crowie is sponsored by Newton running shoes. I haven't seen the shoes available anywhere yet, but this video seems interesting.
Also The Competitors Radio Show featured Alexander just before the race in their podcast.