BMIs based on both types of data have disputable validity, although measured BMI may be relatively better [7,8]. A first problem is that self-reports may be biased compared to measured weight and height [8,9,10].
Is the BMI test valid?
Even though it is often used as one, it is not a true diagnostic of body fatness or of an individual’s overall health. As most of us fitness-focused folks have likely heard, BMI is far from a perfect measurement.
Is BMI a good health indicator?
BMI is a useful indicator of health at the population level. However, the distribution of fat on your body is more important that the amount, when assessing your disease risk. For this reason, your waist circumference is thought to be a better predictor of health risk than your BMI.
Is BMI an accurate way to measure body fat?
A. BMI (your weight in kilograms divided by the square of your height in meters) is a pretty reliable way to determine whether you have too much body fat. That said, BMI is not a perfect measure because it does not directly assess body fat.
Do doctors still use BMI?
It is used in population studies, by doctors, personal trainers, and others. However, BMI has some important flaws. For example, it does not measure overall fat or lean tissue (muscle) content. BMI is derived from a simple math formula.
Is there a better measure than BMI?
Waist-to-height ratio (WHtR)
WHtR is more accurate than BMI because it takes central fat into consideration. Central fat is important because it collects around the organs in your midsection and has been closely linked to conditions such as heart disease.
What is the best BMI for a woman?
A BMI of 18.5–24.9 is considered normal or healthy for most women.
Is WHR a better indicator than BMI?
WHR is an easy, inexpensive, and accurate way to see how much body fat you have. It can also help predict your risk for heart disease and diabetes. A few studies suggest that WHR is even more accurate than BMI for predicting the risks of cardiovascular disease and premature death .
What should your BMI be?
For most adults, an ideal BMI is in the 18.5 to 24.9 range. For children and young people aged 2 to 18, the BMI calculation takes into account age and gender as well as height and weight.
Why we should not use BMI?
BMI is a reasonable indicator of body fat for both adults and children. Because BMI does not measure body fat directly, it should not be used as a diagnostic tool. Instead, BMI should be used as a measure to track weight status in populations and as a screening tool to identify potential weight problems in individuals.
Are BMI charts realistic?
BMI (body mass index), which is based on the height and weight of a person, is an inaccurate measure of body fat content and does not take into account muscle mass, bone density, overall body composition, and racial and sex differences, say researchers from the Perelman School of Medicine, University of Pennsylvania.
Does gender affect BMI?
Share on Pinterest BMI incorporates height and weight but not body composition, fitness, age, or sex. For adults ages 20 years and older, BMI incorporates weight and height, but it does not take age or sex into account.
Why do doctors rely on BMI?
According to the Centers for Disease Control and Prevention, BMI is an “inexpensive and easy screening method” that is “strongly correlated” with weight-related medical conditions — serious health problems including heart disease, stroke, type 2 diabetes, sleep apnea and breathing problems, and numerous types of cancer …
Does BMI Work If You muscular?
Since there is no adjustment factor for BMI relative to muscle mass and body frame, many experts recommend also measuring waist circumference and often consider other weight-related risk factors including high cholesterol, high blood sugar, family history, smoking and inactivity when assessing risk of obesity-related …
Why do doctors use BMI if it’s inaccurate?
BMI does not measure body fat percentage
One of the main issues with BMI is that it cannot account for the difference between muscle and fat. Because muscle tissue is more dense than fat, many athletes and bodybuilders are considered overweight according to BMI despite being in peak athletic health.