Is tape measure more accurate than your BMI?

Is traditional measuring using tape more efficient than BMI? Experts believe so. Research shows that measuring height-to-waist ratio is a 'much better indicator' of health than BMI. 

BMI does not directly measure body fat, but it is a widely followed method. According to the study, using a tape measure may help pinpoint those who have visceral fat,i.e. fat stored around their vital organs. 

Experts point out that if the circumference of the waist is less than half a person's height, it is a 'good indicator' that they are at a healthy weight, particularly in the elderly. 

How is BMI calculated? 

BMI is calculated by dividing your weight in kilograms by the square of your height in meters. 

Compared to the direct measure of body fat, BMI is quick and simple to calculate, inexpensive, non-invasive and easily collected during health care visits. 

BMI does not distinguish between fat, muscle, and bone mass, and sometimes BMI categories are associated with health problems as well. For example, a BMI in the obesity category often indicates excess weight for height. Too much weight can increase the risk for chronic conditions like high blood pressure, high cholesterol, and so on.  

Also, a BMI of more than 30 is classified as obese. An AIIMS study recently found that nearly half of the obese individuals experience severe body image concerns. 

As old people age, they tend to lose muscle, and their body fat percentage is actually higher, but their weight is still dropping, so BMI starts coming down.  

Doctors point out that the waist-to-height ratio is better as it measures around your waist and will give a more accurate measurement of visceral fat.

A tape measure is actually cheaper than a set of weighing scales. 

The study, published in the International Journal of Obesity and led by researchers at the universities of Sheffield and Nottingham, analysed data from the Health Survey for England between 2005 and 2021.