When training for the running segment of the triathlon, it's very important to warm up properly. Warming up before the actual run with stretching prepares the muscles for the actual exertion of effort, and minimizes the risk of injury that may occur. Here are some light stretches for the shoulders and hamstrings along with light movements
A triathlon is a multi-sport endurance event involving swimming, bicycling and running. The multiple phases of this event must be completed within immediate succession of each other, and the event is timed, along with the transitions between each event.
Here's footage from the 2010 Hawaii Ironman triathlon world championships. The annual event in Kailua-Kona is the culmination of a series of Ironman triathlon qualification races held worldwide, and is generally regarded as an honored and prestigious event among triathlon athletes.