Studies have shown that a BMI of 25 or higher is associated with an increased health risk of conditions that include coronary heart disease, certain forms of cancer, stroke, high blood pressure and non insulin-dependent diabetes.
Although BMI can be used for most men and women, it does have some limits. BMI does not distinguish body fat from muscle. It may overestimate body fat in athletes and others who have a muscular build. It may underestimate body fat in older persons and others who have lost muscle.