In Health Tips On 28 June 2017
Adolphe Quetelet introduced the concept of BMI or the body mass index to the world in the 1830's. It is a tool which is commonly used to assess whether a person's weight is normal for his height or not. It has been in use for almost two centuries now and it is still very popular. Of course BMI is not the final say in deciding whether the person's weight is appropriate or not but it is definitely the first tool to be used to determine obesity. The drawback with BMI is that it doesn't differentiate between muscle weight and weight from fat. Hence it does not yield correct result for athletes. Other tools are used to assess the quantity of fat in the body. On a basic level though, BMI is a pretty good and easy way to assess whether you are normal weight, underweight or overweight. It is very easy to calculate the BMI. You just need to understand the formula which is your weight in kilograms divided by your height in meters (kg/m2). So you simply need to measure your weight and then take your height and square it (in meters). Let's say you are five and half feet tall, so your height in meters would be 1.7. Now to get the square of 1.7, multiply 1.7 by 1.7 and you will get 2.89. Weight in pounds has to be converted into kilograms. So let's take the weight as 200 pounds which would be 91 in kilograms. So now we have to calculate the BMI of a five and a half inch tall person whose weight is 91 kgs. Divide the weight by height square that is 91 by 2.89. We get 31 as our BMI, which means that the person is obese. There are various ranges in the BMI chart by which we can classify the obese, the underweight and the normal weight. If your BMI is 18.5 or less than that, it means you are underweight. A person with a normal weight for height would have his or her BMI in the range of 18.5-24.9. The next category is of overweight people whose BMI ranges between 25 and 29.9. A person is said to be obese when the BMI exceeds 30. So the person in our example above is obese but his obesity is still not on the higher side. You can calculate BMI using different weights and you will see that an obese person might just need to lose only 5 kilograms to come into the overweight category. It's good to know the BMI formula; it will help you in keeping a check on your weight. You can even encourage others to lose weight quick so that they can normalize their BMI. You don't need to worry if you don't know how to convert pounds into kilograms or feet into meters. Simply multiple your weight in pounds by 4.88 and then divide it by height square (in feet). For example, a person weighs 200 pounds and is 6 feet tall; his BMI would be 976/36 which is 27.1. so the person comes in the overweight category. Know you BMI and lose weight quick if you do not come within the "normal" category!