Your body-mass index ("BMI") is a measure of your height/weight ratio and there is a correlation between this ratio and your general health.
BMI is calculated by taking your weight in kilograms and dividing it by the square of your height in meters. Data suggests that people with BMIs between 19 and 22 live longest and death rates are noticeably higher for people with indexes 25 and above.
However, these figures should be viewed with caution as it is possible to have a high BMI and a low body fat percentage (for example, look at rowers, who typically have BMIs above 25).
The BMI is only one measure of your health and body fat percentage, blood pressure, resting heart rate, cholesterol and other measurements are at least as important as BMI.
