As most of us fitness-focused folks have likely heard, BMI is far from a perfect measurement. Much of the time, and often when it really counts, the BMI measurement may actually overestimate or even underestimate a person’s body fat. And when it does, it really does.
Who is BMI not accurate for?
For most people, BMI provides a “reasonable measure” of body fat, but is not accurate for athletes (who weigh more because of muscle) or older people who have lost height, he said. Other methods of measuring body fat also have their pros and cons.
Is BMI accurate if you are muscular?
Crucially, BMI doesn’t distinguish between fat and muscle and studies have found it unreliable.
Is BMI the most accurate measure of a person’s health status?
Is it a good indicator of health? Despite concerns that BMI doesn’t accurately identify whether a person is healthy, most studies show that a person’s risk of chronic disease and premature death does increase with a BMI lower than 18.5 (“underweight”) or above 30.0 (“obese”) ( 4 , 5 ).
Does body type affect BMI?
BMI doesn’t account for body composition, which means it misses the difference between muscle mass and 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.
Why do I weigh more than I look?
One easily forgotten reason is that your weight only indicates your body mass index (BMI), not your body composition, which is the amount of muscle versus fat you have on your body. Your body composition makes a huge difference in what you look like even though it can’t be measured by the scale.
Does breast size affect BMI?
BMI is genetically correlated with breast size.
Can you be overweight with muscle?
BMI is not a perfect measure of weight or obesity. It often identifies fit, muscular people as being overweight or obese. That’s because muscle is more dense than fat, and so weighs more.
What weight do I need to be to have a BMI of 25?
4 in. tall is considered overweight (BMI is 25 to 29) if she weighs between about 145 and 169 pounds. She is considered obese (BMI is 30 or more) if she is closer to 174 pounds or more.
Why is BMI not accurate for elderly?
You can’t tell between fat, muscle or fluid mass so using BMI may not be accurate. For the elderly, muscle mass is much lower in comparison to fat mass, and many have medical conditions that can increase fluid mass as well.
What is importance of BMI?
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 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 skinny fat?
“Skinny fat” is a term that refers to having a relatively high percentage of body fat and a low amount of muscle mass, despite having a “normal” BMI. People of this body composition may be at a heightened risk of developing diabetes and heart disease.
What should my waist size be?
For your best health, your waist should be less than 40 inches around for men, and less than 35 inches for women. If it’s larger than that, you may want to talk with your doctor about what your next steps are, including losing weight. You can’t spot-reduce your waist, or any other part of your body.