What's your BMI?
Many people have a distorted perception of what constitutes a healthy body weight. We're surrounded by images of glamorous people, many of whom are in fact underweight. Looking at yourself in the mirror isn't a very useful way to assess whether you're a healthy weight either. Most people compare themselves with others rather than by objective standards.
Doctors check your body size by measuring your weight and height. This calculation is known as the body mass index (BMI). Research has shown that people within a certain range of body size tend to live the longest and enjoy the best health.