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The Role of Calories in Energy Balance
The caloric balance is really the dictator of whether you have a positive energy balance or negative energy balance and there's really no escaping that. Whether it's fat or carbohydrate it really doesn't make a difference. The muscle protein is in a constant state of turnover meaning synthesis and breakdown is occurring constantly. There's an energy cost of that turnover which is about one third of the total resting energy expenditure so that if you have a large muscle mass large active muscle mass the metabolic expenditure of that protein turnover is going to contribute to the energy use in that individual.