People often mistakenly think that our body burn fat and energy consumption only during physical activity and movement. In order to avoid wrong thoughts so we want to explain the functioning of our metabolism, and when, how and why it needs calories. The basal metabolic rate or MB, is the amount of energy expended by a body at rest, and you need to and vital metabolic functions, such as breathing, digestion, blood circulation, liver activity, glandular secretion and activity of the nervous system.

Why spend energy at rest?

Basal metabolism accounts for about 60% – 70% of daily energy expenditure because the heart, brain and kidneys need a lot of calories to function properly. It depends on many variables such as age, sex, race, muscle mass, physical activity exerted, body temperature and is therefore constantly changing depending on the person and the moment. Sometimes it may happen that the metabolism is slow and in that case you can follow the advice to try to speed it up , either with the ‘ sport that with the supply.


The total energy expenditure

calculation basal metabolic rate is only one of the variants to be measured in order to understand what is our total energy expenditure, or our daily caloric requirement. Even when we introduce the foods in our body vary the energy expenditure, which is higher in protein foods: the work of digestion is called “diet induced thermogenesis “(DIT). Another variable to consider in the consumption of energy is the physical and intellectual activity (EFA), the more a person is studying and doing sport needs more calories.

What influences the MB

The basal metabolic rate is expressed in Kcal / hr because it is associated with the body surface area of each individual. Persons with the same weight, for example, but of different heights will have a different MB. It is therefore important to have the right attitudes to life that help us to increase the metabolism. factors that influence it are many:

Age: Mb is the highest for the young and decreases with advancing years
Gender: Men have a higher metabolism than women
Fitness: those who make sport has a MB higher than those who lead a sedentary life
Climate: the heat increases the basal metabolic rate
Hormones: testosterone and thyroid hormones can speed up your metabolism
Sleep: when we sleep lowers the MB
Pregnancy: in last trimester of pregnancy, the metabolism increases because more energy is used for the development of the fetus
Medications: There are some supplements and certain drugs, amphetamines, caffeine that increase metabolism