MODEL RELEASED. Weight measurement. View of an obese woman being weighed at a weight loss clinic. The staff member (left) has a stethoscope around her neck, used to listen to the heart to diagnose any problems which may be due to her weight. Medically, obesity is a condition in which an individual weighs 20% more than their ideal weight. Ideal weights are determined from factors including age, gender and height. Clinics such as this aim to provide a friendly yet determined environment in which weight can be lost through a combination of a healthy eating and exercise. Obesity can cause severe health problems, such as heart disorders, diabetes and osteoarthritis.