post-title portfolio-title Obesity and weight control 2014-10-14 11:54:14 no no

Obesity and weight control

Obesity and weight control

Obesity is a chronic condition defined by an excess amount of body fat. Body mass index (BMI) is a term routinely used by physicians and researchers to describe and calculate a person's body weight, taking into account one's height to determine a person's obesity or general overweight/underweight condition. The BMI equals a person’s weight in kilograms divided by height in meters squared (BMI = kg/m2). For adults, a BMI of 30 or more is considered a state of obesity and a BMI greater than 40 is considered to be a state of severe obesity. Approximately one in three Americans is obese and the incidence of obesity has doubled since 1991. Obesity is more than a cosmetic concern for it is associated with a number of diseases that can harm one’s health. Obesity increases the risk of developing a number of chronic disease including: adult onset diabetes, high blood pressure, high cholesterol, heart attacks, stoke, chronic liver disease, congestive heart failure, cancer, gallstones, gout, osteoarthritis, sleep apnea and pickwickian syndrome. The balance between calorie intake and energy expenditure determines a person’s weight. When intake of calories exceeds calories burned by the body, this net positive energy is stored as fat, resulting in weight gain and potential obesity. Likewise, when there is a net negative calorie balance this result in weight loss. The most common causes of obesity are overeating and physical activity. At present, we know that there are many factors that contribute to obesity (such as genetics, overeating, slow metabolism, physical inactivity, medications, psychological factors and certain diseases), some of which have a genetic component.

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