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Approximately 1.2billion people in the world are overweight and at
least 300million of them are obese. According to the World Health
Organization, obesity is one of the 10 most preventable health risks

Obesity is more than just a few extra pounds; it is when a person reaches a

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Why is obesity prevalent in the UK?

1. Increased consumption of highly processed foods (high in fat, high in sugar, high
energy density, high GI and low satiety value)

2. Increased grazing on foods high in fat and sugar (particularly in adolescents and is
linked to working mothers- snack when…

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Activity levels for teenage girls are particularly low with 64% of 15 year old girls being
classified as `inactive'

Health risks of obesity

Cardiovascular disease: this includes CHD, stroke and hypertension.

Blood cholesterol and blood pressure with increasing BMI.

Joint problems e.g. osteoarthritis of the knee

Metabolic problems e.g. type…

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The same amount of energy in and energy out = weight says the same

More in than out= weight gain (positive energy balance)

More out than in= weight loss (Negative energy balance)

Factors contributing to positive energy balance:

1. What individuals eat: high fat energy dense, high sugary foods


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Excess energy intake;

Energy can be consumed through protein, carbohydrates and fat. Excess calories are
converted and stored as triglycerides, in the adipose tissue. If excess calories are
consumed over a period of time, without an increase in energy expenditure, the
excess body fat may lead to obesity.

Eating a…

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Researchers believe that some obese people have a faulty ob gene. Such people do
not make enough leptin and as a result they don't get a sense of feeling hungry or
full (satiety). This makes it harder to control the amount of food they eat making
them more likely to…

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Most likely, genetic and environmental factors (including learned eating habits,
participating in physical activity together with the consumption of healthy foods)
combine to bring about this increased risk (can account for approx. 30%)

Obesity risk also alters with:

Gender: women are more likely to be overweight

Ethnic group: South Asian…

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Increase amount of fruit and vegetables (less energy dense, high in fibre and
contain natural sugars)

Increase consumption of starchy foods (potatoes, cereals) to increase satiety


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