Maintain a healthy weight for you Keeping your weight in a moderate range can protect you from conditions such asTrusted Source: high blood pressure high cholesterol heart disease stroke type 2 diabetes Your body mass index (BMI) and your waist circumference are two measurements that can help determine if you have a moderate weight, according to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Trusted Source. A doctor will also consider other factors such as your age, ethnicity, body composition, and health history when recommending a moderate weight range for you. Remember, weight isn’t just about a number on the scale. Everyone is different, so it’s best to work with a doctor to determine a moderate weight for you.