FOOD, FACTS and FADS

Exploring the sense and nonsense of food and health

The Truth about the Body Mass Index?

Leave a comment

 

The Body Mass Index (BMI) has many limitations.  Even though it correlates with the amount of body fat, it is not a very good indicator for evaluating the health affects of being overweight or obese as the current study below indicates.  It is not applicable to athletes who have highly developed muscles which contributes a high degree of lean body mass. In these people, their BMI may be high but their disease risks may be low. It is also not accurate in the elderly population who may have lost muscle mass referred to as sarcopenia.

It may be more important to access the location of body fat stores. There are two major body fat locations: subcutaneous fat which is located under the skin. This type does not appear to increase health risks. The second  type of adipose tissue is visceral fat which is located around the organs in the abdomen. Generally, fat in the hips and thighs is primarily subcutaneous and abdominal fat is visceral.  An increase in visceral fat is associated with a higher risk of heart disease, high blood cholesterol, high blood pressure, stroke, diabetes and breast cancer.

Many health experts  promote the use of the waist circumference which can roughly estimate the risk of visceral fat and should be used with the BMI. Visceral fat storage is more common in white men than in women.  However, after menopause, visceral fat increases in women. For men in the greater or equal to a 25 BMI range,  a waist circumference greater than 40 inches is associated with an increased disease risk; for women in that BMI range, a waist circumference of greater than 35 inches increases risk. If a person is under five feet in height or has a BMI greater than 35, these cutoffs are not helpful in predicting health risks.

CLICK HERE

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s