# How accurate is BMI if you are muscular?

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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.

## Can muscle mass affect BMI?

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.

## Does BMI distinguish between fat and muscle?

There are a myriad of reasons why BMI isn’t as accurate a measure of health as many of us were brought up to believe, but one of the main ones is that BMI can’t distinguish between fat and muscle. A pound of fat takes up a much larger volume on the body than a pound of muscle, even though they of course weigh the same.

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## How do you calculate BMI with muscle mass?

How to calculate Body Mass Index. Body Mass Index is a simple calculation using a person’s height and weight. The formula is BMI = kg/m2 where kg is a person’s weight in kilograms and m2 is their height in metres squared. A BMI of 25.0 or more is overweight, while the healthy range is 18.5 to 24.9.

## Is BMI inaccurate for athletes?

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. … CT and MRI scans can accurately measure body fat, but are usually very expensive.

## Why is my body fat low but BMI high?

This is partially because muscle weighs more than fat, so if your body fat percentage is low, but you weigh more than what’s average for your height, your BMI could say that you are obese when you aren’t.

## What is the ideal BMI for athletes?

The American Exercise Council on Exercise recommends a BMI at or above 18.5 and body fat of 14 percent for women and six percent for men. The best athletes in sprint events tend to have a larger mean mass and height than long-distance runners.

## 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 a good BMI percentage?

According to the National Institutes of Health (NIH) : A BMI of less than 18.5 means that a person is underweight. A BMI of between 18.5 and 24.9 is ideal. A BMI of between 25 and 29.9 is overweight.

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## What is more accurate than BMI?

WHtR is more accurate than BMI because it takes central fat into consideration. … Young adults should try to maintain a WHtR of at least 0.5 or lower. Measurements. Related to the WHtR are circumference measurements of various body parts, such as the arm, waist and leg.

## How do you get an accurate BMI?

To calculate your BMI, divide your weight in pounds by your height in inches squared, then multiply the results by a conversion factor of 703. For someone who is 5 feet 5 inches tall (65 inches) and weighs 150 pounds, the calculation would look like this: [150 ÷ (65)2] x 703 = 24.96.

## What can I use instead of BMI?

Better than BMI: 4 ways to track your health besides the scale

• Waist-to-height ratio (WHtR) The cousin of the BMI, waist-to-height ratio compares — you guessed it — waist circumference to height, rather than overall weight to height squared. …
• Measurements. …
• Resting heart rate (RHR) …
• Skinfold Calipers.

21.07.2014

## Are athletes BMI higher?

And highly trained athletes are at a greater disadvantage: their excess muscle typically puts them at a higher BMI, so they may actually be considered obese.

## Do doctors still use BMI?

Body mass index, or BMI, has been used for over 100 years to help health professionals decide whether a patient is overweight or underweight. It is used in population studies, by doctors, personal trainers, and others.

## Does your BMI really matter?

Is BMI an accurate assessment of my health? Yes and no. BMI is a useful tool for healthcare professionals to quickly identify health risks—for example, a person with a high BMI has a greater chance of developing cardiovascular disease and diabetes—but your BMI alone doesn’t provide a detailed picture of your health.

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