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Promoting physical activity 

Health Benefits of Physical Activity


Risk reduction

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CHD and Stroke



Type 2 Diabetes



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Lifestyle factors which can reduce the risk of developing heart disease and stroke include: not smoking, choosing healthy foods, doing regular exercise,

keeping your weight down, and drinking alcohol in moderation.


What are heart disease and stroke?

The term 'heart disease', or 'coronary heart disease', is used for conditions caused by narrowing of one or more of the coronary (heart) arteries by atheroma. The problems this can cause include: angina, heart attack, and heart failure. (It is confusing as there are many other heart conditions such as heart valve problems, congenital heart problems, etc. But, these are not usually included when we talk about 'coronary heart disease'.) Heart disease is common in the UK in people   over 50.  Visit  British Heart foundation

A stroke means a part of the brain is suddenly damaged. The common cause of a stroke is due to an artery in the brain which becomes blocked by a blood clot (thrombus). The blood clot usually forms over some atheroma.

So, if you can prevent a build up of atheroma in the blood vessels, you are less likely to develop heart disease or have a stroke. If you already have heart disease (such as angina), you may prevent, or delay, it from getting worse if you prevent further build-up of atheroma

What is atheroma?


Patches of atheroma are like small fatty lumps which develop within the inside lining of arteries (blood vessels). A patch of atheroma makes an artery narrower, which can reduce the blood flow through the artery.

Over time, patches of atheroma can become larger and thicker. Sometimes a blood clot (thrombosis) forms over a patch of atheroma, and completely blocks the blood flow. Depending on the artery affected, this can cause a heart attack, a stroke, or other serious problems.


Risk factors

Everybody has some risk of developing heart disease or stroke. However, certain 'risk factors' increase the risk. (These mainly increase the risk of atheroma building up within the artery wall.) Risk factors include:

  • hypertension (high blood pressure).
  • diabetes.
  • smoking.
  • lack of exercise.
  • obesity.
  • high cholesterol level.
  • an unhealthy diet.
  • excess alcohol.
  • a strong family history. This means if you have a father or brother who developed heart disease or a stroke before they were 55, or in a mother or sister before they were 65.
  • ethnic group. (For example, south Asians in the UK have an increased risk.)
  • being male.

Some risk factors are more 'risky' than others. For example, smoking causes a greater risk to health than obesity. Also, risk factors interact. So, if you have two or more risk factors, your health risk is much more increased than if you just have one. For example, a male smoker who takes no exercise and has a strong family history of heart disease has quite a high risk of developing heart disease before the age of 60.

Some risk factors are 'fixed' and you cannot change them. For example: a family history, being male, or if you are from certain ethnic groups. However, if you have a fixed risk factor, you may want to make extra effort to reduce preventable risk factors.

Preventable and treatable risk factors

Risk factors which can be altered to reduce your health risk are briefly discussed below.


Lifetime smoking roughly doubles your risk of developing heart disease. Your risk of having a stroke, and developing other diseases such as lung cancer, are also increased. (The chemicals in tobacco get into the bloodstream from the lungs to do the damage.) If you smoke and are having difficulty in stopping, then see your practice nurse for help and advice. Medication is an option which can help you to stop smoking.

Stopping smoking is often the single most effective thing that you can do to reduce your health risk. The increased risk falls rapidly immediately after stopping smoking (although it may take a few years before the excess risk reduces completely).

Note: Passive smoking is harmful for health too. Breathing other people's smoke is called passive, involuntary or secondhand smoking. The non-smoker breathes "sidestream" smoke from the burning tip of the cigarette and "mainstream" smoke that has been inhaled and then exhaled by the smoker.  passive smoking in the home, have a 25 per cent increased risk of heart disease and lung cancer. A major review by the Government-appointed Scientific Committee on Tobacco and Health (SCOTH) concluded that passive smoking is a cause of lung cancer and ischaemic heart disease in adult non-smokers, and a cause of respiratory disease, cot death, middle ear disease and asthmatic attacks in children

visit Action on smoking and health(ASH)

 Lack of exercise 
On average, the risk of developing heart disease is about a third less in people who exercise compared to those who do no exercise. A stroke is also less likely. To gain health benefits you should do at least 30 minutes of moderate exercise, on most days (at least 5 days per week).

  • 30 minutes in a day is probably the minimum to gain health benefits. However, you do not have to do this all at once. Several short bursts of activity is thought to be equally as good. For example, three 10 minute sessions of activity at different times in a day.
  • Moderate exercise means that you get warm, mildly out of breath, and mildly sweaty. It does not have to be intense. For example: brisk walking, jogging, swimming, cycling, etc. However, a study published in 2003 suggests that the more vigorous the exercise, the better for health - particularly for preventing heart disease.
  • On most days. You cannot 'store up' the benefits of exercise. You need to do it regularly.

 Obesity and overweight 
If you are obese, you can gain health benefits by losing 5-10% of your weight. This is often about 5-10 kg. (10 kg is about one and a half stone.) On average, if you are obese and reduce your weight by 10%, your chance of dying at any given age is reduced by about 20%. This is mainly because you are less likely to develop heart disease, stroke, diabetes, or certain cancers.

Are you obese or overweight?

Body mass index (BMI)
BMI is a good estimate of how much of your body is made up of fat. It relates your weight to your height. You can work out your BMI by dividing your weight (in kilograms) by the square of your height (in metres). So, for example, if you weigh 70 kg and are 1.75 metres tall, your BMI is 70 / 1.75 x 1.75, which is 22.9. Alternatively, your practice nurse can measure and weigh you, and tell you your BMI.

BMI Classed As Health Risk
Less than 18.5 Underweight Some health risk
18.5 to 24.9 Ideal Normal
25 to 29.9 Overweight Moderate health risk
30 to 39.9 Obese High health risk
40 and over Very obese Very high health risk


Eating healthily helps to control obesity, and lower your cholesterol level. Both of these help to reduce your health risk. Also, there is some evidence that eating oily fish (herring, sardines, mackerel, salmon, kippers, pilchards, fresh tuna, etc) helps to protect against heart disease. It is probably the 'omega-3 fatty acids' in the fish oil that helps to help reduce the build-up of atheroma. Also, fruit and vegetables, as well as being low in fat, also contain 'antioxidants' and vitamins which may help to prevent atheroma building up. Briefly, a healthy diet means:

  • AT LEAST five portions of a variety of fruit and vegetables per day.
  • THE BULK OF MOST MEALS should be starch-based foods (such as cereals, wholegrain bread, potatoes, rice, pasta), plus fruit and vegetables.
  • NOT MUCH fatty food such as fatty meats, cheeses, full-cream milk, fried food, butter, etc. Use low fat, mono-, or poly-unsaturated spreads.
  • INCLUDE 2-3 portions of fish per week. At least one of which should be 'oily'.
  • If you eat meat it is best to eat lean meat, or poultry such as chicken.
  • If you do fry, choose a vegetable oil such as sunflower, rapeseed or olive oil.
  • Try not to add salt to food, and avoid foods which are salty.

Click here for health risks of low carbohydrate diet

More on healthy eating


A small amount of alcohol (1-2 units per day) may help to protect you from heart disease. One unit is about half a pint of normal strength beer, or one small glass of wine, or one pub measure of spirits. However, too much can be harmful. Men should drink no more than 21 units per week (and no more than 4 units in any one day). Women should drink no more than 14 units per week (and no more than 3 units in any one day).

click here if you think you have a drinking problem


High blood pressure 
You should have your blood pressure checked at least every 3-5 years. High blood pressure usually causes no symptoms, so you will not know if it is high unless you have it checked. However, over the years, high blood pressure may do some damage to the arteries and put a strain on your heart. In general, the higher the blood pressure, the greater the health risk. Normal blood pressure is less than 140/90 mmHg. (However, if you have diabetes you should aim to have a level less than 140/80 mmHg.)

Medication may be advised if your blood pressure remains high. In some cases high blood pressure can be lowered by:

  • losing some weight if you are overweight.
  • regular exercise.
  • eating healthily (which includes reducing salt and cutting down on alcohol if you drink a lot).


High cholesterol ('lipid') level 
You do not need to have a cholesterol blood test if you are healthy, have no significant family history, and your other risk factors are low. But, a cholesterol blood test is commonly advised:

  • if you have other significant risk factors, such as diabetes or high blood pressure. A high blood cholesterol would add to your existing risk.
  • if you already have heart disease, peripheral vascular disease, or had a stroke or TIA (transient ischaemic attack-'mini stroke' when patients recovers within 24 hours).

As a rule, the higher the cholesterol level, the greater the risk to health. But, the risk is greatest if you also have other risk factors such as diabetes, or high blood pressure. As a guide, a blood cholesterol level less than 5 mmol/l is usually the target to aim for.


If you have diabetes ,it is very important to achieve  good control in order to protect yourself from heart disease , stroke and other complications caused by diabetes.

 Understanding Diabetes




Dr  S S Shashikanth
West London Medical Centre
20 Pield Heath Road,Hillingdon,UB8 3NG
Tel: 01895 233 881 
Fax: 01895812773
Email: admin@londongp.org.uk