The minimum amount of energy expenditure required per unit of time to stay alive

Question

The minimum amount of energy expenditure required per unit of time to stay alive to breathe, maintain body temperature, calculate blood, and keep all body systems functioning - is referred to as the metabolic note. Ideally, it is measured in a person who is awake, is lying down at a comfortable temperature, has fasted and avoided strenuous exercise for 12 hours, and is not under the influence of any medication. The basal metabolic rate is measured by monitoring respiration and finding the rate of oxygen consumption, which is proportional to the energy used. An average basal metabolic rate is 70 kcal/hr (293 kJ/hr) or about 1700 kcal/day (7100 kJ/day). The rate varies with many factors, including sex, age, weight, and physical condition. A rule of thumb used by nutritionists to estimate basal energy needs per day is the requirement for 1 kcal/hr (4.2 kJ/hr) per kilogram of body weight by a male and 0.95 kcal/hr (4 kJ/hr) per kilogram of body weight by a male and 0.95 kcal/hr (4kJ/hr) per kilogram of body weight by a c female. For example, a 50kg (110 lb) female has an estimated basal metabolic rate of (50kg) (0.95 kcal) = (48 kcal/hr) giving a daily requirement of approximately 1200 kcal. Calculated in joules this would be (50 kg) (4 kJ/kg hr) = 200 kJ/hr, resulting in a daily requirement of 1800 kJ. The total calories a person needs each day is determine by his or her basal requirements plus the energy used in additional physical activities. The caloric consumption rates additional physical activities. The caloric consumption rates associated with some activities are listed in the accompanying table. A relatively inactive person requires about 30% above basal requirements per day, a lightly active person such as an athlete or construction worker can use 100% above basal requirements in a day. Each day that you consume food with more calories than you use, the excess calories are stored as potential energy in the chemical bonds of fats in your body and your weight rises. Each day that you consume food with fewer calories than you burn, some chemical energy in your body is taken out of storage to make up the deficit. Fat is metabolized to CO_2 and H_2 O, which the body gets rid of, and your weight drops.

Explanation / Answer

Given thumb rule is 1 cal/hr per kg of body weight for a male

so for 80 kg male need 80 * 1 cal /hr of energy = 80 cal/hr of energy

if calculate per day 80 cal/hr * 24 hr/day = 1920 cal/day

a 80 kg male requires 1920 calories for 1 day

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