Metabolism is generally calculated according to basal metabolic rate, which is commonly formulated as (pulse rate + pulse pressure) – 111. Basal metabolic rate refers to the energy metabolism of the body in a quiet and awake condition, unaffected by ambient temperature, muscle activity, food and mental stress. Common formulas for basal metabolic rate are basal metabolic rate (%) = (pulse rate + pulse pressure) – 111, basal metabolic rate (%) = 0.75 x (pulse rate + pulse pressure difference x 0.74) – 72, and the normal value of basal metabolic rate is -10% to 10%. The rapidity of the basal metabolic rate helps to be able to detect certain diseases such as hyperthyroidism and hypothyroidism, and it is recommended to go to the hospital in case of abnormal basal metabolic rate.