Sustained weight loss for patients who are morbidly obese—usually defined as being 100 pounds or more over ideal body weight or having a body mass index of 40 or higher—is even harder to achieve. And serious health risks have been identified for people who move from diet to diet, subjecting their bodies to a severe and continuing cycle of weight loss and gain known as "yo-yo dieting."

You don’t have to be an athlete to notice how nutrition can impact your performance. For you it could be your performance at work, in the gym, or at home with your family. Performance tells us a lot about your physiology. Whenever you feel low or are finding your performance is suffering, your motivation and desire to continue with the recommendations will diminish.

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