More good reason to get moving and eat healthy! A recent study in the International Journal of Obesity by Australian researchers has shown that an increase in BMI leads to an increased chance of hospitalization. NBC Vitals has a good summary of the article.
BMI (Body-Mass Index), is a measurement of body fat based on height and weight. A BMI of 18-25 is considered normal. A BMI lower than 18 indicates that you may be underweight. Over 25 is an indicator of being overweight or obese. You can calculate your BMI here.