# How to calculate your basal metabolism?

A very light meal in the evening is advised for people who want to lose weight.
In addition to daily physical activity and thermogenesis (what is done during digestion), you have to bear in mind that by the mere fact of being alive, to make your body work, this requires 70% of the daily energy expenditure.
This figure, far from being something banal, leads us to the concept of basal metabolism, which is defined as the amount of calories our body needs during rest time (when we sleep, after eating), in order to function day by day.
This is a basic concept when we want to lose weight, it is a reference that nutritionists calculate through the Basal Metabolism Rate (BMR).
Taking into account four factors that are: the sex of the person, their body mass (in kg), their height (in meters) and their age (in years), we propose two formulas:
Women: Kcal = [0.963 x Pesp (kg) 0.48 x Height (m) 0.50 x Age (years) -0.13] x (1000 / 4.1855)
Men: Kcal = [1.083 x Weight (kg ) 0.48 x Height (m) 0.50 x Age (years) -0.13] x (1000 / 4.1855)
Another equation, better known among dietitians, is the Harris Benedict equations revised by Mifflin and St Jeor in 1990. In order to calculate this rate:

Men BMR = (10 x weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
Women BMR = (10 x weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
It should also be noted that there are several crucial factors when calculating basal metabolism , such as genetic inheritance and the sex of the individual. There are also other important elements such as:
Loss of lean mass with age.
The impact of diet on basal metabolism.
The pregnancy
Scarring in injured people
Sports activity
Environmental factors (temperature, stress, hyperactivity, smoking, caffeine, digestion, thyroid activity).
It is important to know that to calculate the BMR of babies, children and adolescents there are other formulas used to know what their energy intake is.

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