People who are overweight (defined as a BMI between 25.0 and 29.9) or obese (defined as a BMI greater than or equal to 30) are at increased risk for developing a number of medical conditions, including the following:
Calculating your BMI
Your Body Mass Index (BMI) is an estimate of your body fat, based on your height and weight.
- Category BMI range – kg/m2
- Starvation less than 14.9
- Underweight from 15 to 18.4
- Normal from 18.5 to 22.9
- Overweight from 23 to 27.5
- Obese from 27.6 to 40
- Morbidly Obese greater than 40
The higher your BMI, the higher your risk of developing such conditions as heart disease, high blood pressure, sleep apnea, and type 2 diabetes.
- High blood pressure (hypertension)
- Heart disease
- High cholesterol or other lipid disorders
- Type 2 diabetes
- Certain cancers (endometrial, breast, and colon)
- Sleep apnea and respiratory problems
- Gallbladder disease
- Fatty liver disease.
The correlation between the BMI number and body fatness is fairly strong; however the correlation varies by sex, race, and age. These variations include the following examples:
- At the same BMI, women tend to have more body fat than men.
- At the same BMI, older people on average, tend to have more body fat than younger adults.
- Highly trained athletes may have a high BMI because of increased muscularity rather than increased body fatness.
- It is important to remember that BMI is only one factor related to risk for disease. For assessing someone’s likelihood of developing overweight or obesity-related diseases, the National Heart, Lung, and Blood Institute guidelines recommend looking at two other predictors:
– At the same BMI, older people on average, tend to have more body fat than younger adults.
– Highly trained athletes may have a high BMI because of increased muscularity rather than increased body fatness.