Energy expenditureThe notion of spending alludes to act of spending. This verb, in turn, is usually associated with money, although it can also refer to “use or consume something.” Energetic, for its part, is that linked to the Energy: the ability to carry out a job.

The notion of energy expenditure is used with reference to the amount of Energy that the body needs to develop its activities and functions. This amount, measured in calories, is calculated according to the use of the energy that is conserved in the chemical bonds of the nutrients.

The organism it carries out numerous actions constantly: from forming and repairing tissues to digesting food, passing through breathing, conducting nerve impulses and maintaining body temperature. All these processes require energy to take place. Energy expenditure is that energy that the body demands to function properly.

There is, therefore, a energy requirement to be satisfied through the feeding so that the body can specify the necessary energy expenditure. This means that people, to make your body work well, they must eat food that provides them with energy.

To difference between energy requirement (which is determined according to energy expenditure) and energy intake (which is specified through food) is called energy balance, What can be negative (the energy is not enough), neutral (energy expenditure and intake are equal) or positive (a greater amount of energy is ingested than is expended).

The energy balance must be neutral so that the body can develop in balance; In other words, you must consume the same amount of energy it uses. It is important to understand that our body carries out a constant energy expenditure, for all its activities, although it may not seem like it at first glance.

Energy expenditureBetween the phenomena Through which the human body expends its energy, the following three stand out: voluntary physical activity; the thermic effect of food (abbreviated ETA); the expense we make in a state of rest (GER). Except in the cases of highly active people, the portion of total energy expenditure (that is, of the GET) highest is the one that occurs during rest.

There is, on the other hand, the concept of basal metabolism, which is often mentioned in the same context as energy expenditure. Another name by which it is known is basal metabolic output, and it is a process that has a direct relationship with the active cell mass, that is, with the quantity and dimensions of active cells that an organism has.

In each individual, the value of active cell mass It is different according to your age, the stage of your growth and the characteristics of your body (composition and size). The energy used during this process it is used for three others: half is used for the metabolism of cells; 40%, for molecular synthesis (especially proteins); the remaining 10% is used for internal mechanical work, which includes the contraction of the heart and the action of the respiratory muscles.

Concepts of energy expenditure at rest Y basal metabolic rate, but there is a clear difference between them, which revolves around their measurement: the first is measured a minimum of 3 hours after the last meal, at any time of the day; the second, on the other hand, in the morning, in a state of absolute physical and mental relaxation, around 10 hours after the last meal.