1. Home
  2. Health
  3. Eating Disorders

Overweight

By Matthew Tiemeyer, About.com

Updated: December 10, 2008

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Definition:

Clinically, overweight is defined as having a body mass index (BMI) between 25.0 and 29.9. Body mass index is a value calculated directly from a person's height and weight.

People classified as obese have BMIs ranging from 30.0 to 39.9. Those with BMIs of 40 and above are classified as extremely obese.

Many use BMI as a comprehensive indicator of a person's overall health. Because of this, those who are "overweight" are often considered unhealthy or "at risk," regardless of other health indicators. BMI, in particular, does not take into account how weight is distributed (in muscle, bone, fat, water, etc.). In short, though the state of being overweight is correlated with having a higher percentage of body fat than being of normal weight, an individual can be clinically overweight and not have an overabundance of body fat.

Because children and teens are still growing, their BMIs are used differently. Children and teens in the 95th percentile of BMI for their ages are considered overweight.

Pronunciation: OH-ver-WATE'
Also Known As: There are lots of terms used to refer to a person who is overweight, such as "heavy," "stout," and others that are less flattering. However, overweight is a medical term. Generally, synonyms for overweight are not.
Common Misspellings: overweightness (though this is actually a misused, rather than misspelled, term)
Examples: Though Gwen found that she was defined as overweight by her body mass index, she took comfort in that, in her case, her health was far better than when she weighed less.
Explore Eating Disorders
About.com Special Features

Learn how you can reduce your your numbers with these nutrition and exercise tips. More >

Keep yourself, and your family, happy and healthy this fall with these tips. More >

We comply with the HONcode standard for trustworthy health information: verify here.
  1. Home
  2. Health
  3. Eating Disorders
  4. Eating Disorders 101
  5. Glossary
  6. Overweight - Definition of Overweight in Context of BMI

©2009 About.com, a part of The New York Times Company.

All rights reserved.