Do You Really Need Water?

Olympic marathoner Hayden has learned a lot about endurance running. He says the rules you see with the top runners don't apply to those who have never done it before. The key is not pushing too early on a hill, and he starts trying catch up that push which might throw off how he's distributing his energy tobout the thing. O'Brien also shares some tips for people wanting to run marathons or other long distance races in the future.