Basic metabolic rate, is an indicator that shows us how many calories our body consumes in a day. Metabolism includes the processes the body needs to function. Basal Metabolic Rate (BMR) is the amount of energy per unit time that a person needs to maintain the body at rest. Some of these processes are breathing, blood circulation, controlling body temperature, cell growth, brain and nerve function and muscle contraction. Basal Metabolic Rate (BMR) affects the rate at which a person burns calories and ultimately whether that person maintains, gains, or loses weight. Basal Metabolic Rate accounts for 75% (on average) of the calories we consume each day.