ACTIVITY
Read the
following texts and answer the questions about them.
Obesity
Obesity is a medical condition in which excess
body fat has accumulated to the extent that it may have an adverse effect on
health, leading to reduced life expectancy and/or increased health problems.
Body mass index (BMI), a measurement which compares weight and height, defines
people as overweight (pre-obese) when their BMI is between 25 kg/m2 and
30 kg/m2, and obese when it is greater than 30 kg/m2.
Obesity
increases the likelihood of various diseases, particularly heart disease, type
2 diabetes, breathing difficulties during sleep, certain types of cancer, and
osteoarthritis. Obesity is most commonly caused by a combination of excessive
dietary calories, lack of physical activity, and genetic susceptibility,
although a few cases are caused primarily by genes, endocrine disorders,
medications or psychiatric illness. Evidence to support the view that some
obese people eat little yet gain weight due to a slow metabolism is limited; on
average obese people have a greater energy expenditure than their thin
counterparts due to the energy required to maintain an increased body mass.
The
primary treatment for obesity is dieting and physical exercise. To supplement
this, or in case of failure, anti-obesity drugs may be taken to reduce appetite
or inhibit fat absorption. In severe cases, surgery is performed or an
intragastric balloon is placed to reduce stomach volume and/or bowel length,
leading to earlier satiation and reduced ability to absorb nutrients from food.
Obesity
is a leading preventable cause of death worldwide, with increasing prevalence
in adults and children, and authorities view it as one of the most serious
public health problems of the 21st century.
Obesity is stigmatized in much
of the modern world (particularly in the Western world), though it was widely
perceived as a symbol of wealth and fertility at other times in history, and
still is in some parts of the world.
Source: Wikipedia
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