Diet and exercise

Info on diet and exercise including what the different food groups our required for in the body.

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  • Created on: 10-04-11 14:22
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Diet and exercise
Regular exercise and a balanced diet are needed to keep the
body healthy. Too little food leads to a person being underweight
and prone to illness, while too much food and not enough
exercise leads to a person being overweight and prone to other
illnesses. Excess cholesterol increases the risk of heart disease,
and excess salt causes high blood pressure and increases the
risk of heart disease and stroke.
A mixture of different types of food in the correct amounts is needed to
maintain health. The main food groups are:
The main food groups
food group found in required by our bodies for
potatoes, A source of energy for other life processes.
pasta, bread, Sometimes referred to as fibre, which is actually
bananas, sugar just one very common type of carbohydrate.
and rice
cheese, butter, Fats are needed to make cell membranes and to
margarine and insulate our bodies. They also contain important
oils fatsoluble vitamins [vitamins: organic
substances which are essential in small amounts
to regulate the metabolism and maintain the
immune system ].
meat, fish, eggs Growth and repair.
and cheese
wholemeal The fibre or roughage in our diet is not digested,
bread, fruit, but is important because it allows the muscles in
vegetables and our intestines to move food through our system by
pulses peristalsis [peristalsis: wavelike muscular

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Metabolic rate
A healthy diet contains all the different nutrients in the correct amounts,
and provides the right amount of energy for each individual. An
unbalanced diet can lead to a person becoming malnourished. They
may be too thin or too fat as a result, and they may suffer from
deficiency diseases.
Chemical reactions
Respiration is the chemical reaction that allows cells to release energy
from food. The metabolic rate is the speed at which such chemical
reactions take place in the body.…read more

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Problems such as these are more likely to affect people in the
developing world, where it can be more difficult to get enough food.
Too much food
In warm weather, or when you don't do much exercise, you do not need
to eat as much food as when it is cold or when you have exerted
yourself physically. If you eat too much food without taking enough
exercise, you will become overweight. Very fat people are described as
obese.…read more

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Cholesterol is a substance found in the blood. It is made in the liver and
is needed for healthy cell membranes. However, too much cholesterol
in the blood increases the risk of heart disease, and of diseased
Good and bad cholesterol
The bloodstream transports cholesterol around the body attached to
proteins [proteins: organic compounds made up of amino acid
molecules. One of the three main food groups, proteins are needed
by the body for cell growth and repair. ].…read more

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Salt is found naturally in many kinds of food, but more is added by
food manufacturers and many people add even more when they are
eating. Processed foods often have a high proportion of salt and fat.
Salt added to food during processing accounts for about twothirds of
the average salt intake.
On average, men in the UK eat about 10g of salt a day and women
about 8g a day.…read more


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