Determining the ideal weight is a prerequisite in order to successfully start a diet, and for the correct calculation of the loads in training, and simply as one of the most important indicators of self-control. The approximate Brock method of determining when the constant 100 was taken from the person’s height in centimeters and received the weight in kilograms is considered obsolete, as it does not take into account the type of body structure of the subject.
Recently, it has been replaced by a completely different way of defining indicators that you need to strive for. Now everyone is interested in the question of how to calculate body mass index (BMI). You can do the calculation of this coefficient manually, you can download a special program, or you can use a certain web service. The abundance of various online calculators on the web allows you to calculate body mass index in a few seconds. The mathematically calculated formula looks like the ratio of the weight of a person taken in kilograms to the square of height (in meters).
Further, the evaluation process is reduced to comparing the result with tabular data. The table was filled on the basis of a wealth of statistical research data. From this it follows that the results must be treated critically, since an ideal formula that takes into account all the unique structural features of your body does not yet exist.
If we consider the concept of "normal body mass", then its calculation is made for a group of people of the same sex, age, height and other indicators. Each new condition leads to a more accurate definition of indicators for a particular person. The ability to calculate body mass index is provided on the basis of the classical analysis of classical indicators, weight and height of a person, but the main assessment is based on tabular indicators.
When differences in a person’s weight are determined by the type of constitution, gender and age, this does not raise questions. When an attempt is made to calculate the body mass index, which is optimal for a particular age, then there are certain disagreements and inaccuracies.
Again, the average statistical data on the process of stabilization of body weight in humans lead to 25 years of age. That is, normal weight is calculated for a person of this age. In other words, a weight of 25 years is the closest to normal, and even ideal.
A number of parallel studies make this theory untenable. Human body mass - the value is not quite constant. With age, an increase of up to 8% is observed. But to old age, in order to calculate the body mass index, it is necessary to take into account the decrease in its indicators.
If during the conduct of such introspection the results did not satisfy you, then you must look for the cause, of course, in yourself. But sometimes a structural feature of an individual goes beyond the usual indicators. In this case, it is necessary to calculate the body mass index according to general rules, but the table for evaluation should be selected according to the group to which you are the closest to.
For example, narrow-chested asthenics are relatively lighter than normostenics, and the normal weight of hypersthenics (broad-chested) exceeds the values for the representatives of the first two groups in magnitude. But this difference was made taking into account the volume of the chest.
But there are unique “instances” that, according to the structural features of their bodies, do not fit into any frames and calculated tables. For particularly accurate calculations, these values of the subcutaneous fat layer are used.
For average estimates, below are the body mass index data in normal form, as well as those that go beyond the norms.
If in your calculations you received an index of less than 18.5 kg / m2, then this is a clear sign of a lack of body weight. If the MT index is in the range of 18.5 - 24.9, then your weight is closest to the ideal. Holders of the MT 25 - 29.9 index are overweight. For obesity of the first degree, a BMI of 30 to 34.9 is characteristic. The second degree of obesity among index holders is between 35 and 39.9. BMI of more than 40 corresponds to the III degree of obesity.