Energy Expenditure Slows During Extreme Caloric Restriction

Ninety-Five percent of people who lose weight gain it back again within one year. One reason is that extreme caloric restriction slows metabolism and reduces caloric expenditure. Researchers from the University of Chile found that overweight women on calorie-restricted diets (20 calories per kilogram of bodyweight per day) reduced resting energy expenditure by 168 calories per day (10.6%). Resting energy expenditure was higher in women with more muscle mass. The study showed that the body adapts to caloric restriction by reducing energy expenditure, which makes it extremely difficult to maintain lost weight. (Nutricion Hospitalaria, 31:2428-2436, 2015)

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