If you have a lower resting metabolic rate, your body spends fewer calories
If you have a lower resting metabolic rate, your body spends fewer calories maintaining your body at rest than someone your size with a higher rate. And, if your body is metabolically efficient, it burns fewer calories while in motion.
Differences in resting metabolic rates and metabolic efficiency may explain up to about 22 pounds of weight gain, says Victoria Catenacci, MD, a researcher with the University of Colorado at Denver. This could help explain differences in normal weight vs. overweight, but many researchers believe that higher levels of excess weight (clinical obesity) are probably a result of excessive food intake and/or low physical activity.
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