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Obesity is another term for being overweight. It is medically defined as a weight to body surface ratio (BMI) of 30kg/m2 or more. Morbid obesity is defined as being 100 pounds or more above one's ideal body weight which in turn is defined relative to one's height. This correlates to a BMI of 35 to 45. Higher BMIs are referred to as super obesity. The incidence of obesity in general has been steadily increasing in North America, Australia, Europe, the Middle East and South America (i.e. worldwide) over the last few decades leading to a rise in weight loss surgery procedures performed and profitability of weight loss groups like Weight Watchers, Jenny Craig etc.
