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
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.