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BMI Basics

Having a high body mass index can up your risk of many serious diseases. Check your BMI knowledge in our quiz.

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BMI Basics
BMI Basics
Question 1 of 20 Correct

True or false: Men and women determine their BMI differently.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. Both men and women use the same formula to determine their BMI.

BMI Basics
Question 2 of 20 Correct

True or false: Children and teens determine their BMI differently than adult men and women do.

Correct! Sorry, that’s incorrect.

The correct answer is: This is true. Children ages 2 to 19 use gender-specific age charts to plot BMI. After 19, they use the same chart men and women do.

BMI Basics
Question 3 of 20 Correct

Which of these traits explains why BMI is preferred by many doctors?

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The correct answer is: Doctors prefer using a BMI over other body mass measurement tests because it is inexpensive, simple and non-invasive.

BMI Basics
Question 4 of 20 Correct

What is the formula to determine a person's BMI?

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The correct answer is: The formula used to determine a person's BMI is the ratio of their weight to their height, squared. BMI is most often determined in kilograms over meters squared.

BMI Basics
Question 5 of 20 Correct

A BMI measurement is not very useful for which of these populations?

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The correct answer is: All of the above. A BMI reading is not very useful in body builders or athletes because it is not suited to people who are overly muscular. The BMI is also not very accurate for older people who have lost a lot of their muscle mass as well as for people who are unusually sedentary.

BMI Basics
Question 6 of 20 Correct

True or false: BMI provides a measure of your total body fat.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. A BMI reading does not know the difference between body fat and muscle mass. Therefore, it's not possible for a BMI reading to determine your percentage of body fat.

BMI Basics
Question 7 of 20 Correct

Anything below which of these BMI numbers is considered underweight?

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The correct answer is: A person with a BMI of less than 18.5 is considered underweight.

BMI Basics
Question 8 of 20 Correct

Which of these BMI ranges defines normal weight?

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The correct answer is: A person with a BMI between 18.5 and 24.9 is considered normal weight.

BMI Basics
Question 9 of 20 Correct

Which of these BMI ranges defines overweight?

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The correct answer is: A person with a BMI of 25 to 29.9 is considered overweight.

BMI Basics
Question 10 of 20 Correct

Which of these BMI ranges defines obese?

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The correct answer is: A person with a BMI of 30 to 39.9 is considered obese. A BMI of 40+ is considered severely obese.

BMI Basics
Question 11 of 20 Correct

A person who is severely obese (with a BMI of 40+) is typically how many pounds overweight?

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The correct answer is: A person who has a BMI over 40 is typically more than 100 pounds over their ideal weight.

BMI Basics
Question 12 of 20 Correct

What BMI range is considered the healthiest?

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The correct answer is: A BMI range of 20 to 25 is considered the healthiest for most adults.

BMI Basics
Question 13 of 20 Correct

Having a low BMI puts a person at risk for which of these conditions?

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The correct answer is: All of the above. Having a low BMI puts a person at risk for osteoporosis, amenorrhea (absence of a menstrual period), cardiac abnormalities, impaired immune system function and other conditions.

BMI Basics
Question 14 of 20 Correct

Having a high BMI puts a person at risk for which of these conditions?

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The correct answer is: All of the above. Having a very high BMI puts a person at risk for heart disease, cancer, infertility, high blood pressure, blood (fat) lipid abnormalities, depression, gallbladder disease, sleep apnea, stroke and type 2 diabetes among others.

BMI Basics
Question 15 of 20 Correct

True or false: BMI takes into consideration where a person carries his or her excess body fat.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. One limitation of the BMI is that it cannot take into consideration where a person carries excess body weight. People who carry weight in their abdomen are at a higher risk of developing health conditions related to obesity and being overweight than people who carry their weight in their hips.

BMI Basics
Question 16 of 20 Correct

True or false: A woman is more likely to have a higher BMI and still appear to have a normal weight and be healthy.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. Men are more likely to have a BMI outside the healthier range and still appear to have a normal weight and be healthy. That is because men tend to be more muscular, and muscle is more dense (takes up less space) than fat.

BMI Basics
Question 17 of 20 Correct

What is the average American's BMI?

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The correct answer is: The average BMI for Americans is 27.2 kg/m2 (kilograms per meter squared). That means most Americans are overweight.

BMI Basics
Question 18 of 20 Correct

True or false: It is possible to have a normal BMI but be classified as obese.

Correct! Sorry, that’s incorrect.

The correct answer is: This is true. The BMI system is not perfect. It is possible to have a normal BMI but be classified as overweight or obese because you have a high amount of body fat. This condition is called normal weight obesity.

BMI Basics
Question 19 of 20 Correct

You should consider a weight-loss program if your BMI number is over what number?

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The correct answer is: If your BMI is over 25, you will probably want to consider a moderate weight-loss program that includes boosting physical activity and cutting calories.

BMI Basics
Question 20 of 20 Correct

True or false: As long as your BMI is in a healthy range, there is no need to have annual check ups and physicals.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. While a person's BMI rating is a good indication of their body fat and risk for potential weight-related problems, it has its limitations. It does not determine or help detect other conditions that may dramatically affect your health. For that reasons, you shouldn't forgo annual physicals just because your BMI is in a healthy range.

BMI Basics
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BMI Basics
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