You are in Medical Library . I Government Agencies Obesity Obesity is the condition of being overweight because of excess body fat. The World Book Rush-Presbyterian St. Luke's Medical Center Medical Encyclopedia Obesity Obesity is the condition of being overweight because of excess body fat. Strictly, the term obesity is used to denote a body weight that is 20 percent or more over the ideal weight as determined from the life insurance statistics for a person's age, build, sex, and height. The degree of obesity can be determined by measuring the thickness of the fat over the muscles of the back of the upper arm.
Obesity can seriously increase the incidence of diseases.
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