abnormal growth of, adipose tissue due to an enlargement of; fat cell size or an increase in fat cell number or a combination of both. Obesity is often expressed in terms of body mass index. Overweight is usually due to obesity, but can arise from other causes; such as abnormal muscle development or from fluid retention.
regional distribution of, fat within the body. The distribution of fat, inducedby weight gain; affects the risk associated, with obesity & kind of disease that results. It is important to know it, so that we will be, able to distinguish between; those at increased risk, as a result of abdominal fat distribution; in which fat is more evenly & peripherally distributed, around the body.
It being a chronic disease, prevalent in both developed & developing countries; affecting children as well as adults, it is now so common that it is replacing the more traditional public health concerns; including under-nutrition. It is one of the most, significant contributor to ill heath. For industrialized countries, it has been suggested that such increase in body weight; primarily have been caused by, reduced levels of physical activity; rather than, by changes in food intake or by other factors.
It is extremely difficult, to assess the size of the problem & compare the prevalent rates in, different countries; as no exact figures, are
the increased prevalence of obesity, is important in public health planning. The first adverse effect of obesity, to emerge in population; in transition are hypertension, hyper-lipidaemia & glucose intolerance; while coronary heart disease & the long term compilations of diabetes, such as renal failure, begin to emerge several days later.
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