hypothyroidism
Fat Loss Myths Part 1: Overweight People Have Slow Metabolism
Myth: People who are overweight have slower metabolic rates.
Truth: With rare exceptions, people who are overweight have metabolic rates similar to or higher than lean people.
Studies comparing the resting energy expenditure of overweight people and lean people show little difference in basal metabolic rates. The ones that do show a difference show overweight people have higher metabolic rates.
Thielecke, J. Möseneder, A. Kroke, K. Klipstein-Grobusch, H. Boeing and R. Noack. Determination of total energy expenditure, resting metabolic rate and physical activity in lean and overweight people. Zeitschrift für Ernährungswissenschaft Vol. 36, No. 4, December 1997 P310-312
Summary: A new2H/1H and18O/16O equilibration device was tested, standardized and employed for the determination of total energy expenditure. It was shown that overweight men and women have increased resting metabolic rate as well as increased total energy expenditure when compared to their lean counterparts. The physical activity level (PAL)index was slightly decreased which possibly suggests a decreased physical activity in obese people.
I have measured the resting energy expenditure of a large number of overweight people using the Korr ReeVue, and almost all of them were shocked when told their metabolic rate was average or above. Almost all were convinced they had slow metabolisms and claimed they ate very little. Once they started accurately weighing, measuring and recording their daily calorie intake, it became obvious the real problem was excessive calorie intake. They grossly underestimated the amount of calories they consumed daily. Studies using double-labelled water have also shown many overweight people underestimate their calorie intake, or in some cases are simply under-reporting it to researchers. › Continue reading