The one who aspires to an ideal figure, tries to watch fluctuations of the weight. This is much easier if you know the scope of normal body weight with a certain growth. When you know what a normal weight with an increase of 165 cm( 170, etc.) should be, it is much easier to control yourself and not go too far with losing weight. Because excessively low or high body weight can cause irreparable damage to health.
How are frames defined?
It should be noted right away that the indicators of normal weight for one person can
differ from those for another, even if their growth is absolutely the same. An important role in determining the weight limits is played by gender. For men, weights are an order of magnitude higher than for women. This is due to the peculiarity of the structure of the male body, namely, the severity of the bones. For example, the normal weight with a height of 170 cm for a woman is about 55-60 kg, and for a man, the weight at the same growth fluctuates within 63-67 kg. Which bar to stick to, the minimum or maximum, the choice of each individual. These limits are set by physicians and determine those indicators in which the body will feel good.
An easy way to calculate the normal weight of the
The easiest way to determine the normal weight with the growth of a particular person is by the following formula: from the growth rate take away one hundred and from the difference received, take another 10% for men and 15% for women. This formula was derived by the French anthropologist Paul Brock. The data are very approximate, but it is possible to estimate the boundaries in this way.
Basically, the formula is suitable for people with average growth rates. In addition, this method does not show the weight distribution of the figure. Even with normal indices, a person can have full legs or other parts of the body. When calculating the ideal weight, many factors must be taken into account that can affect the final result. Therefore, several other ways of determining normal body weights were invented, which are more accurate.
Body mass index( BMI)
This indicator was derived by the Belgian sociologist Adolf Kjutl. It is still used in medicine and sports, although it has long been proven that the method is not absolutely accurate. The formula for calculating the body mass index is as follows.
BMI = Weight( kg) / height2( m)
The result is a two-digit number that has its decoding from the World Health Organization. If the index fluctuates between 18.5-25, then the weight is considered normal and does not pose a health risk. Indicators of BMI in the range 25-30 indicate the excess body weight. If the figure obtained exceeds the 30 mark, this indicates a certain degree of obesity. It is worth noting that the figures below 18.5 can talk about the lack of body weight, which for a woman is fraught with unpleasant consequences right up to infertility. On men, too little weight can also have a negative effect.
Adjustments in the BMI formula
The body mass index reflects reality only in the case of medium height and normal build. That is, the normal weight with a height of 168 cm for a man on this formula can still be calculated, but if lower, then the figure should be taken away from another 10%.The same is true for women below 154 cm.
For women above 174 cm and men, whose height is more than 188 cm, the result of calculating the normal weight according to the above formula will need to be corrected. For this, 10% is added to the obtained indicator. Adjustments to the formula were added already in the process of using it, when it became clear that for people with growth above or below the average, the results are not reliable.
Example of calculating the normal weight by the formula BMI
Let's consider how to calculate the normal weight with an increase of 180 cm. For this, in the BMI formula, we substitute the growth index and the limits of the body mass index. The result is:
18.5( 25) = X / 3.24, where X is the normal weight with 1.80 m growth.
By simple calculations, we find that the normal weight limits for a given growth are 60-81 kg. For women, you need to add 10% to this figure and get a range of 66-89 kg. It should be noted that these are medical indicators of normal weight, which does not pose a threat to human health. For a comfortable feeling and beautiful reflection in the mirror, some people need to strive for a lower or upper mark. For example, for a healthy young male the height of 180 cm, the weight of 60 kg is considered low, but not fatal.
Factors Affecting BMI Indicators
Many factors affect the normal weight with an increase of 1.60 m( and any other).For example, it is considered that with age, the BMI can grow, and the figure - stay within the norm.
Also considered is the person's way of life. For athletes, this index does not reflect the real picture, since the muscles are much heavier than fatty deposits. And it turns out that a person who is actively engaged in sports life has a BMI over 30. Although in fact, he can not have extra pounds, and BMI does not show the degree of obesity, but the weight of muscle mass.
The constitution also plays an important role in determining normal weight measures. For example, the normal weight with a woman's height of 175 cm is about 60 kg. This figure can safely be increased by a kilogram by five for women with a wide bone. The profession of the model involves a physique with a narrow bone. The weight of the models rarely exceeds 50 kg, while their growth should be at least 175 cm. Often, the desire to approach such forms leads to exhaustion of the body.
Disadvantages of the BMI method
The main drawback of this technique is too approximate data on the body mass norm. Also using BMI can not determine the weight norm for pregnant women and children. The ratio of height and body weight in a child is not the same as in an adult, so even with all adjustments for growth below 164 cm, the formula can not be applied.
The normal weight at height of 160 sm under the formula BMI can reach 64 kg, but that from the medical point of view for the adult it is comprehensible, for the child can be dangerous. In addition to the growth in the indicator of the normal weight of the child, his age should be taken into account.
Other methods for determining the weight norm
In the process of using the body mass index, it became clear that this figure does not indicate an ideal figure. The findings show only normal weight from a medical point of view, but with the same growth and weight, one person may look taut and slim, and the other - full and loose. It depends on the percentage of fat in the body of the total mass and its distribution throughout the body. For example, a normal weight with a height of 170 cm for a sports person can be a kilogram by ten more than for the one who leads a sedentary lifestyle.
Several modern methods are used to determine the percentage of fat in the body, but only two have become widespread. The first method is that a small current pulse is passed through the body. The rate of passage of the current pulse through the fat layers is much lower than through the muscles and bones. And the more fat, the slower the signal goes. This method is widespread due to its accuracy, but until recently it was only available in medical centers, since sophisticated professional equipment was used. Now you can carry out this measurement even at home with the help of scales that include such a function.
The second method is to measure a fat gauging device, which resembles a caliper, and fat folds in different parts of the body. The data obtained by the experimental method are compared with the developed tables and the degree of obesity is calculated. An electronic device for such measurements is called a caliper. It automatically analyzes the received data and immediately outputs the result. The advantage of this method is the portability of the caliper, which takes up very little space. As in the first case, with it you can make measurements and calculate the normal weight with a height of 165 cm or any other.