## Health difficulties from being overweight

*These difficulties are associated with obese and overweight adults*

Adults whose Body Mass Index is greater than 25 (

*overweight*) or whose BMI is greater than 30 (

*obese*) have a marked increase in risk for various diseases and health conditions, including,:

## Derivation

B.M.I. Prime is simple way of defining a single figure that is not immedieately related to any other units of measurement, but which can quickly and easily rank a person into a category. Eg:

- BMI Prime < 0.74 = Underweight
- BMI Prime > 0.74 and < 1.00 = Optimal weight
- BMI Prime > 1 = Overweight

BMI, sometimes known as the Quetelet index, is a measure used to estimate a person's body shape based upon a person' weight and height. It originated in Belguim around the 1840's by Adolphe Quetelet. It is a simple calculation based on the individual's body weight divided by the square of their height.

## The formula

The formula below is used to measure BMI

- BMI = weight(kilograms) / height
^{2} (metres^{2}) (Metric Units) - BMI = 703 . weight(pounds) / height
^{2} (inches^{2}) (Imperial Units)

## BMI limitations

BMI categories are generally regarded as a satisfactory tool for measuring whether sedentary individuals are underweight, overweight or obese with various exceptions, such as: athletes, children, the elderly, and the infirm.

*See wikipedia.org/wiki/Body_mass_index#Limitationsinfomation*.