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Every year roughly million people participate in marathons and half marathons in the United States and no matter what level they are every one of these runners has likely hit ldquoThe Wallrdquo running out of muscle fuel in the final miles and slowing down precipitously This setback and other common running disappointments are nutritional or metabolic in nature In The New Rules renowned fitness journalist and training coach Matt Fitzgerald cuts through the mythsdistilling the most upndashtondashdate science to help runners overcome the universally experienced nutritional barriers that prevent success in the marathon and half marathonFrom basic tenets of training to nutrition guidelines The New Rules is the first resource for runners to fully integrate nutrition with training for a complete and systematic preraceplan Fitzgeraldrsquos powerful and easyndashtondashuse tools will enable runners of all levels to attain their ideal racing weight calculate their precise daily energy needs and formulate a custom nutrition plan.