Question

define the term body mass index

Answer 1

hi mate
Sarvesh is here

The term body mass index means that is equal to weight in kg upon height in metre square in case weight is less than 18.5 considered to be under nearest are or more than 25 it is considered to be over weight .


i hope helped you

Answer 2

Body mass index (BMI) is a measure of body fat based on your weight in relation to your height, and applies to most adult men and women aged 20 and over. For children aged 2 and over, BMI percentile is the best assessment of body fat.





To work out your BMI:

1) Divide your weight in kilograms (kg) by your height in metres (m). 
2) Then divide the answer by your height again to get your BMI.

This is expressed in formula form as: 
Weight (Kg) / Height (m)2

For adults (everyone over the age of 20) there are set categories. For people under the age of 20 there are other factors taken into account, but I will be focusing on adults for now.

The BMI scales for Adults are as follows:

- A score under 18.5 is classed as underweight.
- A score of 18.5-24.9 is classed as a healthy weight.
- A score of 25-29.9 is classed as overweight.
- A score over 30 is classed as obese.

Benefits of measuring BMI:

1) It is a good method of estimating healthy and unhealthy weight ranges in the majority of people.

2) It is quick, easy and costs little to do. You just need a set of reliable scales and a tape measure to calculate your BMI.

3) Due to the above, regular measurements can be taken by the individual and monitored.

Limitations of measuring BMI:

On the flip side there are some serious flaws in BMI measurements.

1) It’s very inaccurate when it comes to measuring people with higher than average muscle mass. Imagine, a lean bodybuilder would more often than not be classed as severely obese via BMI!

2) The lack of consideration of factors such as gender and age in the BMI calculation means it is not an accurate predictor of total body fat mass. It is simply a set of perceived “healthy weight ranges”. Remember weight doesn’t always mean fat! 
For this reason anyone with a specific goal such as losing body fat rather than body weight should avoid using, or relying on, BMI as a metric. 
As many of you gym users have probably realised you can lose fat without losing weight. This is due to increases in muscle and bone-density off-setting the fat loss.

Final Thought: 
BMI certainly has its uses and can be used as a pointer for areas that then need further, more accurate investigation. 
However it isn’t accurate enough to be used as a stand alone diagnostic measurement.