Body Mass Index (BMI) is a number derived from a person's weight and height and is often used to try to quantify a person's body tissue, thus classifying whether a person is underweight. Healthy / Natural, Overweight, or Obese Although there are many criticisms of using BMI for this purpose (some are valid – see below), it's easy to calculate (plus it's just Needs accessible data), has made it a popular. And extensive measurement
BMI is calculated by dividing a person's weight (measured in kg) by their square meter (measured in meters) and thus has units of kg per square meter. The conversion chart or chart can be used when the weight of a person is measured in other units (such as weight in pounds or inches in inches). On the other hand, there are many online BMI calculators, many of which are free that can calculate BMI regardless of the use of metric or English units.
The generally accepted BMI range is as follows:
- Less than 18.5 years – low weight
- 18.5 to 25 – normal
- 25-30 – Overweight
- Over 30 years – obese
These ranges are said to vary depending on the particular population being studied, and have also been discussed and adjusted over time. For example, there are about 23 natural upper limits recommended for Southeast Asian body types, and before 1998, the United States used the upper 27.8 as the upper limit.
In addition, regardless of the exact ranges used, BMI is an incomplete measurement of obesity:
- These results are generally not valid for children or pregnant women
- BMI doesn't take any measure of frame size.
- BMI considers incorrect height by height: it makes short-term people think that they are thinner than they actually are, and tall people are taller than they think they are actually thinner. are.
- BMI uses the mass of whole body tissue, and does not consider it to be fat or muscle. An athlete with a large volume of muscle (which may be overweight on a BMI scale) is very different in reality from a person with low overweight and high fat.
So, given its limitations, does this mean that BMI is useless? By no means, for many people, it can provide a useful idea of where to stand, even if it is not quite accurate. Of course, as you said, it is not applicable in any situation – so if you feel that BMI does not provide you with useful information, you may want to take alternate measures of body fat.