Professional tables of a ratio of weight and height: Ketle index, Brock's formula, John McCallum's formula and others
The body mass index (eng. Body mass index (BMI), BMI) is a value that makes it possible to assess the degree of compliance of a person’s weight and growth and thereby indirectly assess whether the mass is insufficient, normal or excessive. Important in determining indications for the need for treatment.
The body mass index should be used with caution, only for an approximate assessment - for example, an attempt to evaluate the body of professional athletes with it may give an incorrect result (a high index value in this case is due to developed muscles). Therefore, for a more accurate assessment of the degree of accumulation of fat, along with the body mass index, it is also advisable to determine central obesity indices. Taking into account the shortcomings of the method for determining body mass index, a body volume index was developed.
Weight and height ratio tables used by professionals. Keep in mind that weight indicators vary according to gender, age and physiological abilities of a person.
There are different formulas for determining the optimal ratio of weight and height. But all of them are very, very conditional, since they do not take into account many factors: age, gender and physiological characteristics of a person. Therefore, excess fat should be assessed not only by the conditional ratios presented in this table, but also by appearance, thickness of the skin and a number of other factors. With the same height and weight, one person may look full, the other - completely normal.
The objective parameter of the ideal body is the percentage of fat and musculoskeletal tissue. For men, 9 to 15% of body fat is the norm, and for women from 12 to 20%.
Knowing the body mass index (BMI), one can judge about obesity or lack of weight. The index is calculated for adult men and women from 20 to 65 years. The results may be false for pregnant and lactating women, athletes, the elderly and adolescents (under 18). Among the many different methods of calculating the ideal weight, the most popular method is the growth-weight index, body mass index - Quetelet index.
FORMULA: BODY MASS IN CG DIVIDE BY GROWTH IN METERS IN SQUARE B / (P * P)
FOR EXAMPLE: GROWTH 170 CM, WEIGHT 65 KG. MEANS 65: (1.7 * 1.7) = 22.5
The norm for men is 19-25. For women - 19-24.
|Body mass index||Classification||Risk of concomitant diseases|
|Less than 18.5||Lack of body weight||Low (increased risk of other diseases)|
|18.5 - 24.9||Normal body weight||Usual|
|25.0 - 29.9||Overweight (pre-obesity)||Elevated|
|30.0 - 34.9||Obesity Grade I||Tall|
|35.0 - 39.9||Obesity grade II||Very tall|
|40.0 and more||Obesity Grade III||Extremely tall|
The Quetelet index shows a good amount of body fat, but it does not indicate how fat is distributed, in other words, it does not give a visual-aesthetic picture. But you can check your body for the ideality of another formula.
The distribution of fat over the body is determined by the ratio - waist volume (at the level of the navel) divided by the volume of the buttocks:
- The norm for men: 0.85
- For women: 0.65 - 0.85.
Does age affect height-to-weight ratio?
The answer is unequivocal. Yes, of course it does. It is proved that the weight of men and women with age should gradually increase - this is a normal physiological process. Kilograms, which some people consider “superfluous”, may not actually be like that. You can use to determine the optimal weight formula depending on age.
P - in this case growth, and B - age in years. Body weight = 50 + 0.75 (P - 150) + (B - 20): 4
|Height in cm.||Age|
Brock's formula: identifying the relationship of height-age-weight
One of the most popular methods for calculating the ideal weight is Broca’s formula. It takes into account the ratio of height, weight, body type and age of a person.
BROK FORMULA FOR PEOPLE YOUNGER THAN 40 YEARS EQUAL "GROWTH (IN SM) MINUS 110", AFTER 40 YEARS - "GROWTH (IN SM) MINUS 100"
At the same time, people with asthenic (thin-boned) body type - 10% should be subtracted from the result, and people with hypersthenic (wide-boned) body type - should be added to the result 10%.
How to determine your body type?
The constitution is usually divided into THREE types: normostenic, hyperstenic, and asthenic. In order to find out what your body type is, it is enough to measure the circumference of the thinnest spot on the wrist with a centimeter. The obtained circumference in centimeters will be a necessary indicator (Solov'ev index).
|Solovyov Index||Body type||Characteristic for this type of physique|
|for men||for women|
|18-20 cm||15-17 cm||normostenic (normal)||the constitution is distinguished by the proportionality of the main dimensions and the correct ratio|
|more than 20 cm||more than 17 cm||hypersthenic (wide bone)||In people with hypersthenic (wide bone) body type, the transverse body size is much larger than that of normostenic, and especially asthenic. Their bones are thick and heavy, their shoulders, chest and thighs are wide, their legs are short.|
|less than 18 cm||less than 15 cm||asthenic (fine bone)||In people with asthenic (thin-boned) body type, the longitudinal dimensions prevail over the transverse ones: the limbs are long, the bone is thin, the neck is long and thin, the muscles are weakly developed.|
Nagler's formula for height to weight ratio
There is a Nagerr formula that allows you to calculate the ideal ratio of weight and height. At 152.4 cm height should be 45 kilograms of weight. For every inch (ie 2.45 cm) in excess of 152.4 cm there should be another 900 grams, plus another 10% of the weight received.
John McCallum's formula for the ratio of girths
One of the best formulas, created by expert methodologist John McCallum.
McCallum's formula is based on the measurement of the grip of the wrist:
- 6.5 wrist circumference equal chest circumference.
- 85% of the chest circumference is equal to the hips.
- To get a waist circumference, you need to take 70% of the chest circumference.
- 53% of the chest circumference is equal to the circumference of the thigh.
- For neck circumference, you need to take 37% of the chest circumference.
- The biceps girth makes up about 36% of the chest girth.
- Girth for a shin is slightly less than 34%.
- The girth of the forearm should be equal to 29% of the girth of the chest.
But not all physical data will exactly correspond to these ratios, the numbers have an average, average value.
A few more options for the ratio of height and weight:
- The constitution is considered ideal if the waist is 25 cm less than the hips, and the hips are approximately equal to the chest.
- Waist circumference should be equal to "height in centimeters - 100". That is, a woman 172 cm tall will be folded in proportion, if the waist circumference is 72 cm, the hips and waist girth are about 97 cm, that is, if she wears clothing size 48.
- If the girth of the hips is less than the girth of the chest, and the waist girth is less than the girth of the hips by 20 cm, then this figure is called an “apple”. If the circumference of the chest is less than the circumference of the hips, and the circumference of the waist is less than the circumference of the hips by 30 cm or more, this is a pear-type figure.
- For women and girls of medium height - from 165 to 175 cm - this observation turned out to be fair. The girth of their waist in centimeters is approximately equal to the weight in kilograms. One kilogram of weight loss gives a decrease in the waist by one centimeter.
As you can see, there are many ways to calculate the optimal ratio of their height and body weight, depending on a variety of factors. But no matter how you do the calculations, the main thing is that your weight is COMFORTABLE for you. So that you feel free and free in your own body, love yourself and enjoy life to the fullest! - without falling into depression from the fact that in the calculations you (and suddenly!) Showed a “surplus” or “lack” of kilograms.