- Relevant
- How to calculate the muscle mass in the body
- Methods of calculating the percentage of fat in the body
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Calculate the body mass index
The Body Mass Index is a BMI(١) The body mass index can be calculated by dividing the body weight in kilograms by a square of length per meter, and the equation is in metric units as follows:(٢)
BMI = Weight (kilograms) ÷ (length (meter)) ²
For example, if a person weighs 70 kilograms, and its length is 1.75 meters, then the index of the mass of his body is calculated as follows:(٣)
BMI = 70 kg ÷ (1.75 m) = 22.9 kg/m²
The connotations of the results of the body mass index
The outcome of the body’s bloc index indicates the extent of weight gain with length; Where this indicator is determined if a person suffers from a deficiency in weight (English: Underweight), or if he possesses healthy or overwhelming weight, or suffers from obesity, and therefore if the body’s bloc indicate is outside the ideal weight index, then the health of the body is more at risk, and its owner may be exposed to many health problems that we have mentioned. previously,(٤) It should be noted that the body bloc indicate is used to express the various weights of both sexes from the age of 20 years and more,(٥) In the following table, the values of the body’s bloc indicate, weight classification, and the interpretation of these values:(٦)
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| BMI (kg/m²) | Classification of weight | Interpretation of the value of the body mass index |
|---|---|---|
| Less than 18.5 | Lack of weight or thinness | Weight is lower than normal, and it may need to be increased to reach normal weight and a nutritionist should be consulted |
| 18.5–24.9 | Healthy | Weight is appropriate for length, and less likely to develop health problems |
| 25.0–29.9 | Overweight | It may need to lose excess weight for health reasons, and a nutritionist should be consulted |
| 30.0 or more | Obesity | An excessive weight increase, and health may be at risk in the absence of weight, and a nutritionist should be consulted |
Children’s BMI
Although the equation of the body’s bloc indicator is the same for adults and children, its interpretation varies between children and adolescents according to their ages and races, due to the different distribution of fats in their bodies, and the centers of anti -disease and their fulfillment (in English: The Center for Disease Control and Preference) has issued a planning plan (English: Age Growth Charts) to determine the body bloc indicator for children and adolescents according to the value of the two hundreds, so that this value is compared as a result of an indicator of the body of the child or teenager with his peers of the same sex on the growth scheme, for example the child suffers from obesity if it is an indicator His body is 95 per hundred or more on the growth scheme, and the explanation for this is that the child has a percentage of fat exceeding 95% of his peers of sex and age itself,(٧) The following table shows the approved values to determine the indicators of the body’s bloc for children and adolescents, and its classification:(٥)
| BMI (at the values of the two hundreds) | Classification of weight |
|---|---|
| Less than 5% | Lack of weight |
| 5% to less than 85% | Normal weight |
| 85% to less than 95% | Overweight |
| 95% or more | Obesity |
To see more information about the child mass index calculating how you can read an article how to know the child’s normal weight.
The accuracy of the body mass index
One of the means used by most health care providers; Although it is a simple and inexpensive detection, it is not approved for diagnosis, as the specialists need more evaluation to estimate health risks, and from these assessments; The percentage of fat in the body, practice exercises, and nutritional history, as well as family’s health history.(٨)
It is worth noting that the body bloc indicate is not necessarily considered an accurate indication of the level of fat in the body, its same value may be for two different people, but one of them has a higher fat percentage while the other has a higher percentage of muscle mass, in addition to that women’s bodies have a higher percentage of fat compared to men’s bodies on the same measurement of the body’s scourge, and the matter is in the skin. Blacks who have less fat are white, while Asoy have a higher fatty fat.(٩) It is worth noting that those who possess a high muscle mass that have an indication of the body’s mass without this is related to the risk of developing health problems.(١٠)
Other means used to determine the size of the body: the ratio of the hip (in English: WAIST-Hip Ratio), and body composition (in English: Body Composition); Which calculates the mass of fat and muscle mass in the body, and it is worth noting that these means focus more on measuring the percentage of fats and distributing it in the body, so its use with the body’s bloc indicator may contribute to improving the accuracy of the health risks associated with weight.(٤)
the reviewer
- ↑ “Obesity”, www.who.intRetrieved 5-5-2020. Edited.
- ↑ “Using the CDC BMI-for-age Growth Charts to Assess Growth in the United States Among Children and Teens Aged 2 Years to 20 Years”, www.cdc.gov9-5-2014، Retrieved 6-5-2020. Edited.
- ↑ “Body mass index – BMI”, www.euro.who.intRetrieved 6-5-2020. Edited.
- ^ A for Yvette Brazier (9-11-2018), “Measuring BMI for adults, children, and teens”، www.medicalnewstoday.comRetrieved 6-5-2020. Edited.
- ^ A for “Normal weight ranges: Body mass index (BMI)”, www.cancer.org5-2-2016، Retrieved 6-5-2020. Edited.
- ↑ “BMI calculators and charts”, www.medicalnewstoday.com9-11-2018، Retrieved 6-5-2020. Edited.
- ↑ Erica Cirino (21-3-2016), “Body Mass Index”، www.healthline.comRetrieved 6-5-2020. Edited.
- ↑ Kathleen Zelman (12-2-2008), “How Accurate Is Body Mass Index, or BMI?”، www.webmd.comRetrieved 6-5-2020. Edited.
- ↑ “About Adult BMI”, www.cdc.gov10-4-2020، Retrieved 6-5-2020. Edited.
- ↑ William Shiel (5-4-2020), “Medical Definition of Body Mass Index (BMI)”، www.medicinenet.comRetrieved 6-5-2020. Edited.