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Why should I be active?

by Jesse Meester
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Doing regular aerobic activity can help prevent major illnesses. Aerobic exercise is anything that uses oxygen, raises your heart rate and makes you slightly breathless, for example brisk walking or cycling. Whether you’re just starting to exercise or have always been active, make sure you take steps to stay injury free and able to perform to the best of your ability. Nutrition and hydration also play key roles in this – it’s important to eat the correct nutrients to provide the fuel you need to exercise and drink water when you feel thirsty.

Some of the health benefits of aerobic exercise are described below.

Heart health

Exercise can reduce your risk of heart disease and stroke. Inactive people have double the risk of dying from heart disease compared with people who are active. So if you don’t do any exercise at all, even doing a little – for example walking each day – can help reduce your risk of these conditions.

Taking exercise can help to reduce high blood pressure (hypertension). High blood pressure is common – one in three adults in the UK has it. If you have high blood pressure, you’re more likely to have a stroke or heart attack. Exercise can also help to prevent high blood pressure from developing in the first place.

You can help to improve the balance of your cholesterol by exercising. There are two types of cholesterol – low-density lipoprotein (LDL) and high-density lipoprotein (HDL) cholesterol. LDL cholesterol is sometimes called ‘bad’ cholesterol; HDL cholesterol is sometimes called ‘good’ cholesterol. High levels of LDL and low levels of HDL increase your risk of heart disease. Studies show that regular exercise, such as brisk walking or running, is linked to higher levels of HDL cholesterol.

Bones and joints

You’re more likely to have lower back pain if you don’t do any exercise. Eight out of 10 people in the UK have lower back pain at some time in their lives, but people who exercise are less likely to get it. If you do have lower back pain, exercise can help to reduce it.

Regular, moderate activity, including walking, swimming and cycling, can help to treat and reduce pain caused by osteoarthritis. This is the most common form of arthritis, with about eight out of 10 people over 50 affected by the condition. It may also prevent and slow the progression of osteoarthritis.

Physical activity can increase bone mineral density in children and help to maintain strong bones in adolescents. It also slows down bone degeneration later in life. This can help to prevent osteoporosis – when your bones become brittle and more prone to breaking. High-impact exercise, such as running and skipping, puts weight on your bones and increases bone density in younger people. But if you already have osteoporosis, it’s better to choose low-impact, weight-bearing exercise, such as gentle walking or swimming.


You’re less likely to develop certain cancers if you’re physically active. In up to a quarter of all people who get colon or breast cancer, not doing enough exercise is thought to be the main cause.

Some studies show that physical activity can reduce the risk of developing lung, prostate and endometrial (lining of the womb) cancers.

There is some evidence to suggest that exercise can be beneficial if you’re undergoing treatment for cancer or recovering from the disease.


Exercise is especially important if you’re at high risk of developing type 2 diabetes, for example, if you’re overweight, have high blood pressure or have close family members with the condition.

Exercise is also good for you if you already have diabetes – regular physical activity can help control your blood sugar levels and prevent long-term complications.

Mental health and wellbeing

Exercise can both help prevent and treat mental illness. It’s thought that physical activity can reduce your risk of developing depression and dementia, and it may help to treat depression if you already have the condition. There is also some evidence to suggest that exercise can help improve stress and anxiety.1016873_553202148048480_480761279_n

You’re likely to feel happier, more satisfied with life and have an improved sense of wellbeing if you’re physically active. Introduce regular exercise into your routine and you should sleep better, lower your stress levels and boost your self-image.


Taking exercise can help you to manage your weight. Physical activity burns up calories and so helps to create a healthy energy balance. Exercise is essential for everyone for maintaining a healthy weight.

You’re more likely to be obese if you’re inactive. Physical activity alone can help you lose weight if you’re overweight or obese – the more you do, the more you will lose. However, combining exercise with a healthy diet will mean you lose weight faster.

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