First, understand that the basal metabolic rate is the process by which food is converted to energy. The amount of energy used by the body can be measured by the amount of heat produced by it.
Basal energy is the minimum level of energy required to maintain normal body temperature.
A low basal metabolic rate can cause you to gain weight more easily and have a harder time losing weight than someone whose metabolic rate is relatively high. If you have a low rate, it is not because your metabolism is naturally sluggish, it is that you have a low level of muscle mass. Lots of people like to blame a sluggish metabolism on their inability to lose excess weight. And people with a high metabolism seem to devour rasgullas with no noticeable effect. As we age, our basal metabolic rate becomes progressively slower.