Is body mass index (BMI) accurate?

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  1. Weight Watchers®
     
    Weight Watchers® answered:

    Body mass index (BMI) is a measurement that evaluates the relationship between body weight and height. While BMI is not a direct measure of excess body fat, it is the recommended method to diagnose overweight and obesity. Because it expresses the weight-height relationship, BMI provides a more accurate measure than body weight alone.

    But BMI has some limitations. It tends to overestimate body fat in people who are very muscular and underestimate body fat in people who are highly sedentary. BMI also doesn't show where the body fat is located. Abdominal fat carries the greatest health risk.

    Weight Watchers can help you reach a healthy range. Learn more about Weight Watchers and how to join.

    Helpful? 4 people found this helpful
    More Related Answers from Weight Watchers®
    Body mass index (BMI) is a measurement that evaluates the relationship between body weight and height. While BMI is not a direct measure of excess body fat, it is the recommended method to diagnose overweight and obesity. Because it expresses the... More
  2. Dr. Debjani Roy
     

    It is not always accurate as it does not take into account the frame of the individual and muscularity. However, it can give us an idea of what health issues might arise if it is too high. There are other tests that can be done to measure body fat, especially in athletes who have increased muscularity.

    Helpful? 4 people found this helpful
    More Related Answers from NorthShore University HealthSystem
    It is not always accurate as it does not take into account the frame of the individual and muscularity. However, it can give us an idea of what health issues might arise if it is too high. There are other tests that can be done to measure body fat,... More
  3.  Jeff Croswell
     
    Jeff Croswell answered:
    Body mass index is just a quick way to access someone health.  By all means its not the best way to determine it.  To give you an example how it can not be great for healthier people.  If you have a person who is 180 pounds, 5'9 and 30% bodyfat.  Now you have a person who is 180 pounds, 5'9 and 12% bodyfat.  Here is the problem both people will be catorgized as overweight.  Remember it only goes by height and weight.  So this can be misleading. 
    Helpful? 1 person found this helpful
    More Related Answers from Jeff Croswell
    Body mass index is just a quick way to access someone health.  By all means its not the best way to determine it.  To give you an example how it can not be great for healthier people.  If you have a person who is 180 pounds, 5'9 and... More
  4.  Eric Beard - NASM Expert
     
    The Body Mass Index (BMI) is accurate but it only paints part of the picture of health and wellness. 

    Body Mass Index (BMI) correlates an individual’s weight to their height. It helps to determine if someone is carrying too much fat on their body in relation to their height. there is much more to health or wellness than how much fat we carry around. A BMI score higher than 30 places individuals at risk for a host of health conditions and diseases but there is more to look at than just risk of disease. 

    When looking at my clients wellness profile I pay attention to specific goals that they have in mind along with the following areas; bodyweight, body composition, flexibility, cardiorespiratory health, clothing size, quality of sleep, energy levels and possibly more depending on their goals. BMI is important, just remember to look at the big picture.
    Helpful? 1 person found this helpful
    More Related Answers from National Academy of Sports Medicine
    The Body Mass Index (BMI) is accurate but it only paints part of the picture of health and wellness. Body Mass Index (BMI) correlates an individual’s weight to their height. It helps to determine if someone is carrying too much fat on... More
  5. National Academy of Sports Medicine
     
    Body mass index is an easy assessment that can be performed in order to estimate disease risk.  However, this should not be used in place of annual physical exams and other health tests.
    More Related Answers from National Academy of Sports Medicine
    Body mass index is an easy assessment that can be performed in order to estimate disease risk.  However, this should not be used in place of annual physical exams and other health tests. More
  6.  Donovan Green - Elite Trainer
     
    The accuracy of the BMI has been viewed very differently by professionals all around the world. However, it is a very good way to keep track of your overall health. it is a very simple and useful guidline that will give you a great idea on where you fall in the healthy category. It is also good to know your body fat percentage, your BMI will not tell you the difference between body fat and lean mass so get to know the both of them.
    More Related Answers from Nike SPARQ Training Network
    The accuracy of the BMI has been viewed very differently by professionals all around the world. However, it is a very good way to keep track of your overall health. it is a very simple and useful guidline that will give you a great idea on where you... More
  7.  Kristy Lee Wilson - Sharecare Fitness Expert
     
    Body mass index is a simple and consistent method used to determine health risks and mortality rates associated with excessive body weight. Since BMI does not differentiate fat from lean body mass, a healthy athlete with a large amount of lean muscle mass can easily fall into the overweight, or even obese category, based on their BMI. Use BMI as a guide and make sure you continue to see your physician on a regular basis for annual physical check-ups.
    More Related Answers from Sharecare Fitness
    Body mass index is a simple and consistent method used to determine health risks and mortality rates associated with excessive body weight. Since BMI does not differentiate fat from lean body mass, a healthy athlete with a large amount of lean... More
  8.  Wendy Batts - Sharecare Fitness Expert
     

    There is a strong correlation between BMI and the amount of fat that someone carries on their frame. The strength of that reliability can vary by a few factors such as age and gender. For example: at the same BMI women tend to have more body fat than men, and at the same BMI older people tend to have more body fat than younger individuals. Given these variations, BMI is overall a strong predictor of body fatness and valid for the general population. Remember that BMI is only one measure used to predict the likelihood of developing weight related disease and that other health and lifestyle factors should be examined to assess your overall health.

    More Related Answers from Sharecare Fitness
    There is a strong correlation between BMI and the amount of fat that someone carries on their frame. The strength of that reliability can vary by a few factors such as age and gender. For example: at the same BMI women tend to have more body fat... More
  9. Mrs. Marjorie Nolan Cohn
     
    BMI stands for body mass Index and is a measure of height to weight. It doesn’t take into consideration age or gender. Therefore is not the most reliable measure for obesity. It is however, and good rule of thumb tool when trying to determine your health risks associated with weight.

    BMI Categories:

    • Underweight = <18.5
    • Normal weight = 18.5–24.9
    • Overweight = 25–29.9
    • Obesity = BMI of 30 or greater

     

    More Related Answers from Academy of Nutrition and Dietetics
    BMI stands for body mass Index and is a measure of height to weight. It doesn’t take into consideration age or gender. Therefore is not the most reliable measure for obesity. It is however, and good rule of thumb tool when trying to determine... More