BMI is a free and easy way to get a gauge on obesity for research, but as doctors started using it for individuals, they noticed that it doesn’t tell the whole story.
What does a BMI test tell you?
What’s Your Body Mass Index (BMI)? BMI is a way to figure out your approximate level of body fat in an easy, inexpensive way. It’s a number based on your weight and height that can help you tell if you are at a healthy weight for your height. In general, the higher the number, the more body fat a person has.
What BMI Cannot tell you?
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.
What information does BMI gather?
Body mass index (BMI) is a formula that uses weight and height to estimate body fat. A high BMI is associated with an increased risk for chronic diseases such as heart disease, high blood pressure, and type 2 diabetes in adults. BMI provides a reasonable estimate of body fat for most people.
Is BMI accurate if you are muscular?
A glob of muscle weighs about 18 percent more than the same size glob of fat. So, according to the BMI, the sprinter is more overweight than the sedentary person. But as I said earlier, a glob of muscle weighs about 18 percent more than the same size glob of fat, so this is clearly not an accurate statement.
Is a BMI of 20.1 good?
If your BMI is between 18.5 and 24.9, your BMI is within the healthy weight category. This is generally good for your health.
Is a BMI of 20.97 good?
A normal BMI ranges from 18.5 to 24.9. Overweight is defined as having a BMI of 25 to 29.9. A BMI equal or greater than 30 is considered obese.
What does BMI 30 look like?
82.6 / (1.67 x 1.67) = 30
A BMI greater than 40 is considered morbidly obese; between 30-39.9 is considered obese; 25-29.9 is considered overweight; 18.5-24.9 is normal; and less than 18.5 is underweight.
What is the most attractive BMI?
These studies have found that a low waist to hip ratio (WHR) of approximately 0.7  and a low Body Mass Index (BMI; weight scaled for height) of approximately 18–19 kg/m2  are perceived as most attractive in female bodies, while a low waist to chest ratio (WCR) of approximately 0.7, and relatively high BMI ( …
Why do I weigh more than I look?
1. You have gained muscle mass. … Since dense muscle tissue takes up less space than fat, it’s possible you may weigh the same (or even more) yet appear slimmer than another person with the same weight, a similar height and frame because of the difference in your body composition.”
What is the best BMI for a woman?
Doctors consider a healthy BMI for women to be 18.5–24.9. A BMI of 30 or above may indicate obesity. BMI measurements can help someone understand whether they have underweight or overweight.
Why is knowing your BMI important?
Your BMI is a measurement that is a ratio of your weight and height. It’s a good way to gauge whether your weight is in healthy proportion to your height. In fact, knowing your BMI can help you – and your GP – determine any health risks you may face if it’s outside of the healthy range.
What weight do I need to be to have a BMI of 25?
A man who is 5 ft. 10 in. tall is considered overweight (BMI is 25 to 29) if he weighs between about 174 and 202 pounds, and is obese (BMI is 30 or more) if he is closer to 209 pounds or more.
Why is my BMI so high but not fat?
Muscle mass can make you heavier and increase your BMI.
Because muscles are more dense and heavier than fat, bodybuilders and other professional athletes like football players are often considered obese or overweight based on their BMI alone. If you have high muscle composition, you’re probably not overweight or obese.
Does breast size affect BMI?
BMI is genetically correlated with breast size.
Is a BMI of 21 skinny?
A BMI of 20-25 is ideal; 25-30 is overweight and over 30 is obese. If your BMI is under 18.5, you’re considered underweight. If your BMI is 18.5-20, you’re a bit underweight and can’t afford to lose more.