How to help a teenager understand the optimal ratio of his height and weight without harm to his health? To these questions, scientists do not give an unambiguous answer and offer many methods. Consider the most popular - anthropometric table and body mass index.
The cental (anthropometric) table
The table of the ratio of height and weight allows you to determine by age the most appropriate indicators that correspond to the development of the child.
Tables for girls and boys contain ranges with average growth rates and weight of adolescents.
The best result is if the child's weight and height are average. If it is below average, there is a tendency to lag behind in development. Above average - advance in development.
A low or very high rate may be due to both individual developmental characteristics and certain growth disorders.
Very low or very high ratio of height (weight) and age of a teenager is already a cause for concern and obligatory consultation with a specialist.
Body mass index (BMI)
BMI was developed by the National Center for Health Statistics in the US and has gained considerable popularity in the world.
First you need to determine the BMI by the formula of the ratio of height and weight:
BMI = (weight / height / height) * 10000
For example, if a girl is 19 years old, height is 170 cm, weight is 60, then using the available data for the formula, we get:
(60/170/170) * 10000 = 22.
Substituting this number into a special percentile diagonal,
We will see the averaged data for adolescent girls. Similar calculations are made for boys, but another BMI table is used.
If the index of the ratio of height and weight strongly deviates from the average, this may indicate future obesity or anorexia.
When calculating the correct ratio of height to weight, it is important to take into account that all methods are based on averaged statistical data. At the same time, every teenager has his own characteristics, a certain genetic predisposition and is influenced by various factors that influence the overall development.
At the same time, such calculations can help in time to identify possible pathologies in the development of the child.
To be engaged in revealing of ideal proportions of a parity of growth of weight and age - the most fascinating employment. But do not forget that the main task of parents is to teach a teenager to follow a healthy lifestyle and love oneself.