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Fitness Blog Covering Topics Of Interest
Tuesday, January 10 2012
Resting heart rate. The average heart rate for a person at rest is 60 - 80 beats per minute. It is usually lower for people who are physically fit, and often rises as you get older. You can determine your resting heart rate by counting how many times your heart beats in one minute. The best time to do this is in the morning after a good night's sleep before you get out of bed. Maximum heart rate. To determine your own maximum heart rate per minute subtract your age from 220. For example, if you are 45, you would calculate your maximum heart rate as follows: 220 - 45 = 175. Target heart rate. Your target rate is 50 - 75% of your maximum heart rate. You should measure your pulse off and on while you exercise to make sure you stay within this range. After about 6 months of regular exercise, you may be able to increase your target heart rate to 85% (but only if you can comfortably do so). Certain heart medications may lower your maximum and target heart rates. Always check with your doctor before starting an exercise program. Note: Swimmers should use a heart rate target of 75% of the maximum and then subtract 12 beats per minute. The reason for this is that swimming will not raise the heart rate quite as much as other sports because of the so-called "diving reflex," which causes the heart to slow down automatically when the body is immersed in water. VO2 Max. Serious exercisers may use a VO2 max calculation, which measures the amount of oxygen consumed during intensive, all-out exercise. The most accurate testing method uses computers, but anyone can estimate V02 without instrumentation (with an accuracy of about 95%): After running at top pace for 15 minutes, round off the distance run to the nearest 25 meters. Divide that number by 15. Subtract 133. Multiply the total by 0.172, and then add 33.3. Olympic and professional athletes train for VO2 max levels above 80. A VO2 max equaling between 50 and 80 is considered an excellent score for overall fitness. For the average person exercising for fitness and health, this value is not necessary. To determine your maximum heart rate, subtract your age from 220. This number represents how many times your heart should beat per minute at its maximum rate. Multiply that number by 0.6 and 0.85 to determine the range of heart rate to strive for. Healthy people can build up gradually to sustain this heart rate for 30 to 45 minutes at least 3 times a week to build aerobic fitness. The health benefits of exercise depend more on regular activity than on pace, intensity, and heart rate.
Posted by: Food & Exercise 4 Living AT 04:55 am   |  Permalink   |  Email
Tuesday, January 03 2012

What is dehydration?

Dehydration is the excessive loss of water from the body, as from illness or fluid deprivation. Any person who exercises on a regular basis is susceptible to the effects of even mild fluid loss. The value of the body's most important nutrient, water, cannot be underestimated.

Exercise produces body heat, and too much body heat reduces exercise capacity. As the core body temperature rises, blood flow to the skin increases, and the body attempts to cool itself by sweating. During intense exercise, the body temperature rises as high as 39 degrees Celsius (105 degrees Fahrenheit) and the muscle temperature can rise as high as 40 degrees Celsius (108 degrees Fahrenheit). These temperatures make exercise difficult because the body and muscles are competing for blood.

As the body temperature rises, oxygen becomes more of a commodity due to increased circulatory demands. Oxygen is needed to help with the cooling process, and reduces the amount of oxygen available for vital organs, which can lead to severe health risks as well as a drop in athletic performance.
When you start exercising, as much as two percent of the body water is lost. Although this amount is considered a "normal" range for humans, it is certainly not an optimum level for athletic performance. Below is a table that summarizes the effects of minimal fluid loss during exercise.


 
         
PHYSICAL SYMPTOMS AND EFFECTS OF DEHYDRATION
 
         
Body Water Lost Symptoms

   
1 % Few symptoms or signs of any thirst present; however, there is a marked reduction in VO2 max.
2% Beginning to feel thirsty; loss of endurance capacity and appetite.
3% Dry mouth; performance impaired.
4% Increased effort for exercise, impatience, apathy, vague discomfort, loss of appetite.
5% Difficulty concentrating, increased pulse and breathing, slowing of pace.
6-7% Further impairment of temperature regulation, higher pulse and breathing, flushed skin, sleepiness, tingling, stumbling, headache.
8-9% Dizziness, labored breathing, mental confusion, further weakness.
10% Muscle spasms, loss of balance, swelling of tongue.
11% Heat Exhaustion, delirium, stroke, difficulty swallowing; death can occur.

Dehydration can cause any or all of the following:

• Increased heart rate (beats per minute)
• Increased lactate acid in muscles (increased blood acidity)
• Increased body temperature
• Decreased strength
• Any of the following medical conditions: heat cramping, heat exhaustion & heat stroke

The best way to avoid fluid loss is often the simplest: drink plenty of fluids. Water is sufficient to replenish the fluids that are lost during exercise. However, water cannot replace the minerals that are lost during exercise-induced sweating. Sweating releases potassium, sodium and calcium, which are vital for survival. These minerals, also known as electrolytes, are not found in water. It is therefore advisable to consume a supplement, which contains these added minerals, before any strenuous exercise.

One such supplement that contains these electrolytes is a “sports drink.” Although these sports drinks can contain a combination of vitamins and minerals, they also contain simple and complex carbohydrates, predominantly simple sugars, which provide the athlete with an added amount of glucose. This glucose, which is converted by the body into fuel, can later be used to power working muscles.

The carbohydrates that are found in sports drinks are designed, when used as directed, to help in performance, but do not play a direct role in hydration. The added nutrients, potassium, sodium, and calcium, along with the water content of the sports drink, are the determining factors in hydration.

Exercise scientists, along with savvy marketers, have designed the newest product to conquer dehydration - fitness water. This new product has taken regular water and added minerals and vitamins, including those vital electrolytes, potassium, sodium and calcium. This new product targets fitness enthusiasts that want to protect against dehydration, but who are looking to keep their calorie count and sugar intake to a minimum, which can help with weight loss goals.

Caffeinated drinks should typically be avoided before and during exercise. Caffeinated products increase urine output, which raises the amount of fluid loss. This fluid loss is exactly what we are trying to avoid. Many people drink caffeinated drinks before exercise to obtain extra energy. A suggestion to those who need “the extra energy”— avoid the caffeine and take a vitamin B tablet instead. The vitamin B tablet will give the extra energy desired, without the increased fluid loss.

Another product to avoid, especially in relation to hydration, is alcohol. Alcohol, like caffeine, increases urine output, which increases fluid loss. Although most people will not consume alcohol just before exercising, it should be noted that a few drinks the night before a morning workout could have a large negative effect on hydration levels. If you’re planning on exercising the morning after consuming alcohol, drink plenty of fluids, including those necessary electrolytes.

Taking in the required electrolytes, as well as satisfactory levels of fluids, will determine your hydration level. It is vital to monitor the body and to continually take in fluids. By the time thirst sets in, the body has already lost at least two percent of its fluid, and dehydration occurs. At any chance possible before and during exercise consume fluids to avoid the harmful consequences of dehydration.

Posted by: Mark Kovacs, M.Ed, CSCS, USATF II (Sprints) Editor of High Performance Training AT 10:00 am   |  Permalink   |  Email
Sunday, December 18 2011
Many people do not realise that alcohol can be viewed as a nutrient, just like protein, carbs and fat. Would you ever have thought of it that way?. When consuming alcohol the following is to be remembered:
  • Alcohol contains kilojoules and therefore adds extra kilojoules to your daily intake, which can jeopardise your weight management programme
  • The human body prefers to use alcohol as an energy source rather than fat. Consuming too much alcohol will therefore diminish fat loss which is counter productive if your'e wanting to reduce weight
  • It is better to have an alcoholic drink with a meal or a snack as alcohol is absorbed directly from the stomach and may cause hyperglycaemia if taken on an empty stomach
  • Consuming too much alcohol late at night may lead to high blood glucose levels in the morning, especially if you have diabetes. Always take alcohol in moderation and with food.
  • Give preference to the following drinks, as they are lower in kilojoules and/or alcohol:
    • Dry or "lite" white wine
    • Dry red wine
    • Wine "spritzer" - wine mixed with soda water
    • Dry sherry
    • "Lite" Beer
    • Spirits such as whisky, brandy, vodka (have asingle tota and top it up again and again with soda water)
  • If you are trying to maintain weight, do not consume more than 1-2 units of alcohol for female and 2-3 units for males. This is also a good guide for general health as over consumption predisposes high blood pressure, high cholestrol levels, many types of cancer and osteoporosis amongst others.
  • Remember that 1 unit of alcohol is equal to:
    • 125 ml wine or champagne
    • 60 ml sherry
    • 340 ml can or bottle "lite" beer
    • 170 ml regular beer
    • 25 ml of spirits
    • 250 ml "spritzer" at least half should be soda water or ice
    • 170 ml apple cider
    • 80 ml spirit coolers such as Smirnoff Ice
Posted by: Ronald AT 09:57 am   |  Permalink   |  Email
Thursday, December 15 2011
Although this section deals specifically with the healthy options to place in your child's lunch box, the same principles apply to adults preparing lunch for work. Healthy lunches and snacks are important and help with concentration and learning. Healthy eating changes are not always easy to make. Try to set a good example with your own lunches. Encourage children to be involved in their own lunch preparation, and their choices about foods to include. Praise your child when they choose healthy foods for the lunch box.


There are limited times for children to eat during the day, especially at school. Children may prefer to play with friends instead of eating. Encourage your child to sit and eat before heading out to play, or talk to your school about making sure all children get a chance to eat enough before play starts.

Six items to put in a lunch box


  • Vegetables

  • Fresh fruit

  • Dairy food – cheese or yoghurt

  • Protein food – slice of lean meat, hard-boiled egg or beans

  • Starchy food – bread, roll, pita or flat bread, fruit bread or crackers

  • Water.



Food suggestions

There are endless food choices available for lunch boxes. It can sometimes be difficult to decide which foods are healthy choices.

Vegetables
Best choices
Try vegetable sticks with dips, or a small container with mixed vegetables such as cherry tomatoes, carrot sticks, celery, corn, beetroot, sprouts, capsicum, snow peas or cucumbers.

Foods best left out
Crisps are best left for parties.

Fruit
Best choices
Fresh, or tinned fruit in natural juice, are everyday foods. Dried fruit is sticky and high in sugar, so eat occasionally or as part of a meal.

Foods best left out
Dried fruit bars and ‘straps’ are very high in sugar, low in fibre and stick to children’s teeth causing tooth decay.

Dairy food
Best choices

  • Reduced fat cheese slices or cubes.

  • Yoghurt – natural or fruit yoghurt. Try freezing a tub of yoghurt and putting it in your child’s lunch box. By lunchtime it will have partially thawed and be ready to eat.

Foods best left out
‘Dairy desserts’ and flavoured milks are high in sugar.

Sandwiches
Include a variety of bread and fillings, especially if children begin to lose interest in sandwiches.

Best choices
Choose one or more of the following:

  • Salmon or tuna in springwater.Try mini cans of tuna with added flavours.

  • Reduced fat cheese or cheese spread

  • Egg

  • Falafel or lentil patties

  • Sliced lean cold meats such as ham, turkey, chicken, lamb or beef with vegetables

  • Baked beans or bean salad

  • Grated carrot, lettuce or tomato.

Include grainy bread or rolls, flat bread, fruit loaf or buns, bagels, corn or rice cakes, Turkish bread or crispbread. As an alternative try:

  • Pasta – make a salad with lots of raw vegetables

  • Rice – when making fried rice, minimise oil and add lots of steamed vegetables.

Foods best left out
Avoid chocolate spreads, jam and honey. Avoid fatty meats such as salami.

Biscuits and dips
Best choices
Wholemeal or multigrain dry biscuits, crispbreads, or rice cakes with yoghurt, hummus or vegetable dips.

Foods best left out
‘Oven baked’ and plain savoury biscuits are as high in salt and fat as chips.

Muffins and cakes
Try making your own healthy muffins and cakes. Include fruit and vegetables such as sultanas, carrot, zucchini, banana and pumpkin.

Foods best left out
Only offer donuts and cakes occasionally instead of in the lunch box.

Muesli and ‘breakfast’ bars
Almost all ‘bars’ are too high in sugar. Some high fibre cereal bars are better than chewy, high fat muesli type bars.
Try to avoid chocolate bars and muesli bars in lunch boxes. These are expensive and stuck together with fats and sugar.

Best drinks
Water and milk are the best drinks for children. They can be frozen to help keep foods in the lunch box cool.

All sweet drinks such as fruit juice, juice drinks, cordials, sports drinks, energy drinks, flavoured milk, flavoured mineral waters and soft drinks are high in sugar and are not necessary. These drinks can increase the risk of tooth decay, are ‘filling’ and may take the place of healthier foods.

Tips for busy families
Foods should be simple and easy to prepare, ‘ready to eat’ and appetising after several hours of storage in the lunch box.

Foods such as sandwiches can be prepared the night before or on the weekend, frozen then taken for each day’s lunch box. Suitable foods to freeze are: bread, cooked meat, cheese, baked beans.

Food safety
In most cases food is stored in your child’s lunch box for several hours, so the lunch box needs to be kept cool.

  • Choose an insulated lunch box or one with a freezer pack, or include a wrapped frozen water bottle to keep the lunch box cool.

  • Perishable foods such as dairy products, eggs and sliced meats should be kept cool, and eaten within about four hours of preparation. Don’t pack these foods if just cooked. First cool in the refrigerator overnight.

  • If you include left over meals such as meats, pasta and rice dishes, ensure you pack a frozen iceblock into the lunch box.

Peer pressure
Children are influenced by food advertising, and their friends’ food choices.

Remember that not all children go to childcare or school with lunch boxes filled with chips and lollies, despite what children think and say! It is important to keep offering healthy lunch box choices in a variety of ways, as children learn to eat what is familiar to them. Remember that it may take time to change your child’s food preferences to more healthy choices.

Severe food allergy
If your child has a severe food allergy it is advised that you develop a management plan with your family doctor, the school or early childhood setting, teacher and class. The plan may include an agreement to limit common food allergens such as nuts, egg or wheat in the lunch boxes of all children (in the childcare or school class). The school or early childhood setting will notify other parents or carers if certain food or items need to be kept away from children and limited in the lunch box.

Important Lunch Box Tips

Best Choices

  • Vegetables

  • Fresh fruit

  • Dairy food – cheese or yoghurt

  • Protein food – slice of lean meat, hard boiled egg or beans

  • Starch foods – bread, rice or pasta

  • Water

Best Left Out

  • Muesli and chocolate bars

  • Potato crisps and oven baked savoury biscuits

  • Sweet drinks

  • Lollies, honey and jams

  • Fatty meats such as salami


Courtesy of the Victoria Government, Australia

Posted by: Ronald AT 05:24 pm   |  Permalink   |  Email
Tuesday, December 06 2011
                                  

Along with a balanced diet and regular exercise, multivitamins are a good way to stay in good health. For just pennies a day, they may help lower your risk of cancer, heart disease and osteoporosis as well as prevent some birth defects. When undertaking body weight management, taking a multi-vitamin will keep you strong and healthy. Since you are changing your eating habits in one way or another, you want to make sure you are getting in a good amount of your essential vitamins and minerals. Look to include vitamins: A, D, E & B-Complex (B1, B2, B6, B12), minerals: calcium, magnesium, potassium, copper, manganese, chromium, zinc, iodine, boron, iron & selenium in addition to an anti-oxidant. There are many misconceptions about vitamins and the health benefits they offer.
Vitamins play an important role in keeping the body healthy. However, taking large doses of certain vitamins can actually be harmful. For most people, it is best to get the vitamins our bodies need from eating a variety of healthy, unprocessed foods rather than by taking supplements. Vitamin supplements are frequently misused and taken as a form of medicine to treat ailments such as colds or to counteract lifestyle issues such as stress. Contrary to popular belief, vitamins aren’t drugs or miracle cures. They are organic compounds that participate in various metabolic functions. High-dose supplements should not be taken unless recommended under medical advice. Isolating the ‘active ingredient’ is not the answer Proper balance and adequate levels of essential nutrients is important for a range of complex processes in our body. When vitamins are taken as supplements, they are introduced into the body at levels that could never be achieved by eating even the healthiest of diets. They are also sent in ‘alone’. When they occur in food, vitamins have many other companions to help them along the way. For instance, provitamin A (beta-carotene) in food is accompanied by hundreds of its carotenoid relatives. Simply taking a vitamin pill is not an instant fix for feeling run down or lacking in energy. It is the combination of a whole range of compounds (most of which we probably don’t even know about) in plant foods that gives us the protection. When you artificially remove one of them and provide it completely out of context, it may not be as effective and, in the case of some vitamins, can have negative effects
Recommended dietary intakes
 Many people mistakenly believe that since small amounts of vitamins are good for you, then large amounts must be better. In the case of vitamins, it is better to follow the rule of ‘less is more’. The vitamins A, D, E and K are fat soluble, which means they can be stored in the body. Taking high doses of these vitamins, especially vitamin A, over a long period of time can result in harmful levels in the body unless you have a medically diagnosed deficiency. Some of the water soluble vitamins can also cause side effects in high doses. For instance, vitamin B6 has been linked with nerve damage when taken in large doses. For a healthy adult, if supplements are used, they should generally be taken at levels close to the recommended dietary intake (RDI). High-dose supplements should not be taken unless recommended under medical advice. Deficiencies and illness
The human body is able to store vitamins. The fat soluble vitamins A, D, E and K can be locked away in the liver and body fat and stored for a long time. The water soluble vitamins, including B-complex and vitamin C, are mostly only stored for a shorter period of time. A vitamin deficiency takes weeks or months before it will affect your health. For instance, it would take months of no vitamin C before you developed scurvy. An occasional lapse in good eating will not harm you if your usual diet consists of a wide variety of fresh foods.
Sometimes supplements are needed
 Supplements do have a role to play for some groups of people. For instance, people on long-term restrictive weight loss diets or people with malabsorption problems such as diarrhoea, coeliac disease, cystic fibrosis or pancreatitis can benefit from supplements. Folic acid supplements are strongly recommend for women planning a pregnancy to reduce the risk having a baby with neural tube defects, like spina bifida. People who are advised by their doctor that they need to take vitamin supplements are encouraged to consult an accredited dietitian, who can work with their doctor to provide dietary advice related to the person’s situation. If you need to take a supplement, it is best to take multivitamins at the recommended dietary level, rather than single nutrient supplements or high-dose multivitamins.
The common cold and vitamin C
Many people think that vitamin C helps prevent the common cold. Despite exhaustive research across the world, there is still no strong evidence to prove this. Some studies have shown that taking large doses of vitamin C (more than 1,000mg per day) continuously or at the start of a cold may ease some of the symptoms and the duration, on average, making it about half a day shorter. It does not prevent you catching a cold. You also need to consider the health risks associated with taking large doses of vitamin C. Large doses may cause nausea, abdominal cramps, headaches, fatigue, kidney stones and diarrhoea. It may also interfere with your body’s ability to process (metabolise) other nutrients – for example, it could lead to dangerously raised levels of iron. Excessive amounts of vitamin C in the body can also interfere with medical tests, such as diabetes tests, giving a false result. Adults need about 45mg of vitamin C per day and any excess amount is excreted. Stress, depression and anxiety Some vitamin and omega-3 fatty acid deficiencies can lead to emotional disturbances. However, if you are feeling run down, it is more likely to be due to stress, depression or unhealthy lifestyle habits (such as insufficient sleep or smoking) rather than a vitamin deficiency. Feeling under pressure doesn’t automatically lead to a vitamin deficiency, so taking a vitamin supplement won’t necessarily make the stressful feelings go away. More serious mental illnesses, such as schizophrenia and bipolar disorder, aren’t caused or prevented by vitamins, although a healthy diet and good nutrient intake can help support a person to better cope with their condition.
Vitamin E and heart disease
Vitamin E is widely promoted as a beneficial antioxidant that can help prevent heart disease. Unfortunately, several large-scale reviews have conclusively found no evidence that vitamin E supplements prevent death from heart disease. In fact, there may be greater risk of all-cause death from taking such supplements.
Cancer cures
Vitamin A in large doses does not cure cancer and can be toxic, particularly if taken as pills rather than food. There is some evidence that vitamin E could play a small role in preventing some cancers although, equally, there is evidence that it could hasten the onset of other types of cancer; however, this has not been conclusively proved or disproved. While it is argued by some that megadoses of antioxidants can help with the effectiveness of conventional cancer treatments, such as chemotherapy and radiotherapy, the evidence is far from supporting this. In fact, it has been shown that megadoses of antioxidants can actually interfere with some medical treatments of cancer by helping to protect the cancer cells that the therapies aim to eradicate.
Some research findings
A number of studies into supplement use have shown negative findings. For instance: Vitamin A (beta-carotene) was thought to reduce the risk of some cancers but has been linked to an increase in others, such as lung cancer in smokers, if taken in supplement form. Several long-term studies have shown that prostate, breast and lung cancer risk are not decreased by taking high-dose supplements containing vitamins E or C or selenium. People taking high-dose vitamin E supplements have been found to have higher rates of early death (mortality).
Anti-ageing vitamins
Vitamin E is often singled out as the potential fountain of youth. However, there is no evidence that taking large doses of any vitamin can either stall or reverse the effects of ageing. Neither can any one vitamin restore a flagging sex drive or cure infertility. Vitamins and chronic disease
In developed countries, vitamin deficiency is rare but the inadequate intake of some vitamins is not so rare and has been linked to a number of chronic diseases. These include cardiovascular disease, cancer and osteoporosis. There is ongoing research to study the effects of taking vitamin supplements to prevent chronic disease, and evidence around nutrition and diet is constantly changing. It is important you consult with your doctor before taking vitamin supplements in high doses.
Things to remember
Vitamins are not drugs or miracle cures. Taking large doses of vitamins can be harmful because your body only needs vitamins in very tiny amounts. Eating plenty of fruits, vegetables, whole grains and cereals will give your body most of the vitamins your body needs at the right level and in the right balance. Vitamin supplements can’t replace a healthy diet, but a general multivitamin may help if your diet is inadequate.
People who may need vitamin supplements include pregnant and breastfeeding women, people who consume alcohol in amounts over the recommended level, drug users and the elderly.
Posted by: Ronald AT 03:54 pm   |  Permalink   |  Email
Monday, November 28 2011

Eating disorders are a mental illness. They can affect women and men of all age groups, from a range of backgrounds and from different cultures. Despite an increase in the incidence and understanding of eating disorders, many people live with these disorders for a long time without treatment or a clinical diagnosis.

Female adolescents and young women are most commonly affected, but men can be also be affected by eating disorders. Anorexia nervosa is most likely to strike during the mid-teenage years. In the UK a
norexia affects approximately 1 in 150 fifteen-year-old females, and 1 in 1000 fifteen-year-old males. Approximately 1 percent of 16 to 18 year olds have anorexia. About 40 percent of people with anorexia recover completely. Around 30 percent of anorexia sufferers continue to experience the illness long-term


Signs and symptoms
Some habits and behaviours are common to people with eating disorders. They include:

  • Weight loss or weight change, usually due to dieting, but sometimes from an illness or stressful situation.

  • Preoccupation with body appearance or weight.

  • Loss or disturbance of menstrual periods in females.

  • Sensitivity to cold.

  • Faintness, dizziness and fatigue.

  • Increased mood changes and irritability.

  • Social withdrawal.

  • Anxiety and depression.

  • Inability to think rationally or concentrate.

  • Increased interest in preparing food for others.

  • Obsessive rituals, like only drinking out of a certain cup.

  • Wearing baggy clothes or changes in clothing style.

  • Excessive or fluctuating exercise patterns.

  • Avoidance of social situations involving food.

  • Frequent excuses not to eat.

  • Disappearance of large amounts of food.

  • Trips to the bathroom after meals.

  • Dieting.

Dieting, depression and body dissatisfaction are the most common risk factors for the onset of an eating disorder.

Causes
There is no single cause of eating disorders. It is currently agreed that eating disorders are multifactorial – that is, social, psychological and biological factors all play a part, in varying degrees, for different people.



Contributing factors may include:

Social factors

  • Media and other presentations of the ‘ideal’ shape as slim and fit.

  • Mixed messages about health and fast food.

  • Pressure to achieve and succeed.

  • Occupations or pursuits with an emphasis on body shape and size – for example, modeling or gymnastics.

Psychological factors

  • Major life changes or events such as adolescence, relationship breakdowns, childbirth, the death of a loved one, or the accumulation of many minor stressors.

  • Fear of the responsibilities of adulthood.

  • A belief that love is dependent on high achievement.

  • Poor communication between family members.

Biological factors

  • Adolescence and its associated physical changes.

  • Genetic or familial factors.

If you think you have an eating disorder
Many people have problems with their eating. If you do have an eating disorder, you have the right to get help. Remember that these disorders can be overcome.

Getting professional help and support from others is important. Recovery may be slow as you learn to approach food in a more positive way and understand the reasons for your behaviour, but the effort will be worthwhile.

Family and friends
Parents, siblings, partners, friends, extended family, work colleagues and others often experience many different feelings as they learn to cope with the effects of an eating disorder on the person, and on their own lives.

The strain of living with an eating disorder can create tensions and divisions within a family. There may be feelings of confusion, grief, anger, guilt and fear.

Family and friends can remind their loved one that the effort associated with recovery will be worthwhile for everyone. The most important thing is to show love, care and faith in the person, and seek advice at the earliest possible time.

Some suggestions for family and friends include:

  • Be honest and open about your concerns.

  • Use ‘I’ statements rather than ‘you’ statements. For example, ‘I am concerned for you because I have noticed you are not so happy at the moment’ rather than, ‘You aren’t happy at the moment’.

  • Focus on the person’s behavioural changes, rather than their weight, food consumption or physical appearance.

  • Try to take the focus off food and weight. The person with the eating disorder is already likely to be excessively focused on food and weight issues.

  • Mealtimes should not be a battleground. Frustrations and emotions need to be expressed but not at mealtimes, which are already likely to be difficult.

  • Do things as you usually would. The person with the eating disorder needs to learn to co-exist with food and other people, rather than others learning to co-exist with the eating disorder.

Treatment and recovery
Many different forms of therapy are available and it is important to remember that different approaches work for different people. Once the right approach is found, prospects of recovery are excellent. Professional help and support from others is important.

Because the disorders affect people physically and mentally, a range of health practitioners might be involved in treatment including psychiatrists, psychologists, doctors, dietitians, social workers, nurses and dentists.


Things to remember

  • There is no single cause of eating disorders.

  • Dieting, depression and body dissatisfaction are common risk factors for the onset of an eating disorder.

  • Eating disorders can be overcome with professional help and support from others.

Posted by: Ronald AT 03:54 am   |  Permalink   |  Email
Monday, November 21 2011

Stroke is the interruption of blood to the brain. This may be due to blockage of a blood vessel in the brain or rupture of a blood vessel, causing bleeding in the brain or into the space surrounding the brain. The most common type of stroke is ischaemic, caused by a blood clot blocking an artery or blood vessel. The brain cells in the immediate area die and those in the surrounding areas are affected by the reduced blood flow. Once brain cells die, their functions die with them.

An estimated 150,000 people have a stroke in the UK each year.Stroke accounts for around 53,000 deaths each year in the UK. Stroke is the third most common cause of death in England and Wales, after heart disease and cancer. Stroke accounts for 9 per cent of all deaths in men and 13 per cent of deaths in women in the UK. Stroke has a greater disability impact than any other chronic disease. Over 300,000 people are living with moderate to severe disabilities as a result of stroke. The direct cost of stroke to the NHS is estimated to be £2.8 billion. The cost to the wider economy is £1.8 billion. The informal care cost is £2.4 billion. Stroke patients occupy around 20 per cent of all acute hospital beds and 25 per cent of long term beds. Stroke units save lives: for stroke patients general wards have a 14% to 25% higher mortality rate than stroke units. Each year over 130,000 people in England and Wales have a stroke. About 10,000 of these are under retirement age.


Stroke is influenced by different risk factors. Some of these – age, gender and family history – are beyond your control. However, you can substantially reduce your overall risk by making healthy changes to your diet and lifestyle.

TIA or transient ischaemic attack
A transient ischaemic attack (TIA) is often called a ‘mini stroke’. It is a powerful warning that a severe stroke may follow. The symptoms are identical to those of a full stroke, but disappear in a few minutes and last no longer than 24 hours. A TIA can appear hours, days, weeks or months before a full stroke but is more common within days or a few weeks. Just like full strokes, TIAs need emergency treatment and should not be ignored.

Warning signs
Stroke is a medical emergency. The longer a stroke remains untreated, the greater the degree of stroke-related brain damage. The warning signs of both stroke and TIA include:

  • Sudden blurred or decreased vision in one or both eyes

  • Numbness, weakness or paralysis of the face, arm or leg

  • Difficulty speaking or understanding

  • Dizziness, loss of balance

  • Difficulty swallowing

  • Severe headache.



High blood pressure
Blood pressure is a measurement of the force your blood puts on blood vessel walls as it travels through your body. High blood pressure is medically known as ‘hypertension’ and is one of the most important risk factors in stroke.

Normal blood pressure is around 120/80. High-normal blood pressure is between 120/80 and 140/90. If your blood pressure is consistently over 140/90, you have high blood pressure. The levels for normal blood pressure are a guide only. In general the lower your blood pressure, the lower your risk of stroke. Your doctor can talk to you about your blood pressure and risk of stroke and may recommend treatment if required.

You can control hypertension by reducing your weight, exercising regularly, eating a low salt, low fat and high fibre diet, and taking antihypertensive medication (if necessary).

Cigarette smoking
Smoking can increase your risk of stroke by increasing blood pressure and reducing oxygen in the blood. Seek advice on how to quit smoking by calling the NHS Free Smoking Helpline: 0800 022 4 332 Monday to Friday 9am to 8pm, Saturday and Sunday 11am to 5pm for guidance and support.

Diabetes
Diabetes can damage your entire circulatory system and is a risk factor for stroke. Type 1 usually occurs from a young age and is treated with insulin injections. Type 2 usually occurs from 30 years of age onwards and is treated with either tablets or, in some cases, insulin
. Talk to your doctor about controlling diabetes if you are diabetic.

Other important risk factors
Other factors that can increase your risk of stroke include:

High cholesterol
High cholesterol is a contributing factor to blood vessel disease, which often leads to stroke. To reduce cholesterol in your blood, eat foods low in saturated fat. Choose lean meats and low fat dairy products. Your doctor may prescribe medication to lower your cholesterol but diet changes and exercise are still important.

Obesity
Being overweight or obese can increase the risk of stroke. Too much body fat can contribute to high blood pressure and high cholesterol and may lead to heart disease and type 2 diabetes. If you are unable to maintain your weight within recommended levels, ask a doctor or nutritionist for help.

Alcohol
Your risk of stroke may be reduced with moderate alcohol intake (one to two glasses a day). Excessive amounts of alcohol can raise blood pressure and increase your risk of stroke.
Diet and exercise
A diet low in fat and salt will reduce your risk of stroke. Eating a balanced diet of fresh foods (wherever possible) is recommended. Avoid processed or canned foods as they can be high in sodium, or salt. Check a food’s sodium content in the list of ingredients on the label (low salt food has a level of less than 120mg/100g).

A good balance between exercise and food intake is important to maintain a healthy body weight. People who participate in moderate activity are less likely to have a stroke. Try to build up to at least 30 minutes of moderate physical activity most days of the week. Talk to your doctor about an exercise program – people with high blood pressure should avoid some types of exercises.

Irregular pulse (atrial fibrillation)
You are more at risk of stroke if you have an irregular pulse due to the condition atrial fibrillation (AF). Your doctor can diagnose this condition and advise you on how best to manage this if it happens. If you experience symptoms such as palpitations, weakness, faintness or breathlessness, it is important to see a doctor for diagnosis and treatment.

Risk factors beyond your control
Stroke is influenced by some risk factors that are outside a person’s control. These include:

  • Age – the majority of people who suffer from stroke are 65 years or older.

  • Gender – men are at higher risk than women.

  • Family history – a family history of cerebrovascular disease may make you more susceptible to stroke.

Statistics on stroke
Each year over 130,000 people in England and Wales have a stroke:

  • One in three people die within a year of having a stroke.

  • Stroke kills more women than breast cancer.

  • Almost one in five people who experience a stroke are under the age of 55.

  • Men are more likely to suffer a stroke and at a younger age.

Things to remember

  • Stroke may occur due to blockage of a blood vessel in the brain or rupture of a blood vessel, causing bleeding in the brain or into the space surrounding the brain.

  • Many strokes are avoidable and can be caused by unhealthy diet and lifestyle choices.

  • Some of the major risk factors for stroke include high blood pressure, cigarette smoking and diabetes.

Stroke prevention

Strokes can be fatal but the risk can be reduced. Many stroke risk factors are lifestyle related, so everyone has the power to reduce their risk of having a stroke. Some stroke risk factors, such as gender, age and family history, can’t be controlled.

Lifestyle factors that increase your risk of stroke include high blood pressure, smoking, diabetes, high blood cholesterol levels, heavy drinking, a diet high in salt and fat and lack of exercise. You can reduce your risk of having a stroke by making a few simple lifestyle changes.


Causes of stroke
‘Stroke’ is a term used to describe the interruption of blood flow to an area of the brain. This can occur in the following ways:

  • Haemorrhagic stroke – an artery may rupture and cause bleeding into the brain tissue.

  • Ischaemic stroke caused by atherosclerosis – an artery may become blocked by progressive thickening of its walls.

  • Ischaemic stroke caused by embolism – a clot blocks an artery and prevents blood getting to part of the brain.

The brain cells in the immediate area are killed because they are deprived of oxygen. The dead area that results from stroke is known as an infarct. Without prompt medical treatment, the area of brain cells surrounding the infarct will also die.

Risk factors
Some stroke risk factors can’t be controlled. These include gender, age and family history. However, many stroke risk factors are lifestyle related. Everyone can reduce their risk of having a stroke by making a few simple lifestyle changes.

Lifestyle-related factors that increase your risk of stroke include:

  • High blood pressure

  • Cigarette smoking

  • Diabetes

  • High blood cholesterol levels

  • Heavy drinking

  • High fat, low fibre diet

  • Lack of exercise.

It has been reported that the use of some birth control pills may increase a woman’s risk of stroke, but the evidence is limited.

Reduce high blood pressure
High blood pressure (hypertension) is the most significant risk factor for stroke. Blood pressure refers to the pressure inside the arteries. Hypertension means that the blood is exerting more pressure than is normal or healthy. Over time, this weakens and damages blood vessel walls, which can lead to cerebral haemorrhage.
Hypertension may also cause thickening of the artery walls, resulting in narrowing and eventual blockage of the vessel (ischaemic stroke). In atherosclerosis (hardening of the arteries), the pressure of your pumping blood could ‘hose off’ debris from damaged artery walls. The circulating debris (embolism) can cause a stroke by lodging in and blocking a blood vessel of the brain.

Strategies to reduce high blood pressure include:

  • Check your blood pressure regularly and know your numbers.

  • Maintain a healthy weight for your height.

  • Exercise regularly.

  • Choose a low fat, high fibre diet.

  • Reduce or eliminate salt from your diet.

  • Limit your alcohol intake to two or less standard drinks per day.

  • Stop smoking.

  • Take antihypertensive medications to help control high blood pressure.

Quit smoking
Smoking can double or even quadruple your risk of stroke. Some of the chemical ingredients in cigarette smoke (such as nicotine and carbon monoxide) accelerate the process of atherosclerosis. Clots are more likely to form because smoking thickens the blood and makes clotting factors, such as platelets, much more ‘sticky’. Cigarette smoke forces arteries to constrict – a narrowed diameter makes it harder for the thickened blood to move through the vessels.

Strategies to quit smoking include:

  • Seek advice on how to quit smoking by calling the NHS Free Smoking Helpline: 0800 022 4 332 Monday to Friday 9am to 8pm, Saturday and Sunday 11am to 5pm for guidance and support or see your doctor for information and advice.

  • Decide on a strategy, such as ‘cold turkey’ or using nicotine replacement therapy.

  • Keep a smoking diary so that you are aware of your smoking triggers (such as stress or boredom).

  • Decide on a quit date.

  • Ask your family and friends for support.

  • Don’t be discouraged by a slip-up. If you smoke a cigarette, put it behind you and keep going.

Manage your diabetes
Diabetes is a chronic condition in which the body is unable to utilise blood sugar. A person with diabetes is around twice as likely to have a stroke as someone of the same gender and age who doesn’t have diabetes. This is because the high blood sugar levels contribute to the development of atherosclerosis. It is very important that diabetes be kept under control.

Strategies to reduce the effects of diabetes include:

  • See your doctor regularly for check-ups.

  • Monitor your blood sugar levels regularly.

  • Maintain a healthy weight for your height.

  • Exercise regularly.

  • Choose a low fat, high fibre diet.

  • If you are on medication, make sure you are taking it correctly.

Keep cholesterol levels in check
Cholesterol is a fat-like substance that is made by the human body. It has many essential roles to play, but it becomes a problem if levels in the blood are too high. Blood cholesterol contributes to the formation of a substance called atheroma, which sticks to artery walls and leads to atherosclerosis.


Strategies to lower blood cholesterol levels include:

  • Have your blood cholesterol levels checked regularly by your doctor.

  • Switch to a high fibre diet.

  • Reduce your intake of saturated fats (commonly found in animal products).

  • See your doctor for information and advice. Medications may be recommended.

Avoid heavy drinking
Some studies have indicated that drinking moderate amounts of alcohol (such as one or two standard drinks per day) can actually reduce the risk of stroke. However, people who drink heavily are three times more likely to have a stroke, regardless of their age. It is important to limit your alcohol intake.

Suggestions include:

  • Limit your consumption to no more than two standard drinks per day.

  • Have at least two alcohol-free days every week.

  • See your doctor for information and referral if you are finding it difficult to limit your alcohol intake.

Eat a healthy diet
Various studies show that diet is an important risk factor in the development of stroke. Suggestions include:

  • Limit or moderate salt intake.

  • Choose fresh rather than processed foods.

  • Increase your intake of vegetables, fruit and whole grains.

  • Cut out or reduce sugary and fatty foods like cakes, lollies and junk food.

  • See a dietitian who can help you plan a well-balanced low fat, high fibre diet.

Exercise regularly
A sedentary lifestyle increases the likelihood of obesity, high blood pressure and high blood cholesterol levels. These are all important risk factors for stroke.

Suggestions include:

  • See your doctor for a check-up if you haven’t exercised for a while.

  • Choose a range of activities you enjoy.

  • Start your new exercise program slowly and only increase the intensity and duration as you become fitter.

  • Exercise with a friend or join a team sport to add a fun social element to the activity.

  • Remember to warm up and cool down.

  • Contact a physiotherapist or gymnasium instructor for advice and information regarding appropriate exercise.

  • Try to get moderate exercise for at least 30 minutes on (at least) five days of the week.

Things to remember

  • A stroke interrupts blood flow to an area of the brain.

  • Most stroke risk factors are lifestyle related, so everyone has the power to reduce their risk of having a stroke.

  • Some stroke risk factors, such as gender, age and family history, can’t be controlled.

  • Lifestyle factors that increase your risk of stroke include high blood pressure, smoking, diabetes, high blood cholesterol levels, heavy drinking, high salt and high fat diet and lack of exercise.

Posted by: Ronald AT 04:23 pm   |  Permalink   |  Email
Monday, November 14 2011

Salt

Salt is a chemical compound (electrolyte) made up of sodium and chloride. It is commonly used to preserve and flavour foods, and is the main source of sodium in our diet. A small amount of salt is important for good health – it helps to maintain the correct volume of circulating blood and tissue fluids in the body. However, most people consume much more sodium than they need for good health.

The kidneys are the main regulators of sodium levels in the body. Too much sodium can cause high blood pressure and many other health conditions. On the other hand, if sodium levels drop too low, the hormone aldosterone is released and this increases the amount of sodium held in the body by reducing the amount lost in urine. Excessive sodium loss is very rare, but low sodium levels in the body can be dangerous if not treated.

Many of us in the UK eat much more salt than we need
As part of its continued drive to reduce people’s risk of developing coronary heart disease, the Food Standards Agency has today published revised, voluntary salt reduction targets for industry to meet by 2012. More challenging targets for 2012 have been set for 80 categories of foods, to ensure the momentum in reducing salt levels is maintained by food retailers and manufacturers. The revised targets also reflect the Agency’s long-term commitment to reducing the daily average population intake of salt to 6g a day. Around 75% of the salt we eat is already in everyday foods. The targets have been set for foods that make the greatest contribution of salt to our diet, such as bread, meat products and cereals, as well as convenience foods such as pizza, ready meals and savoury snacks.


High sodium intake and blood pressure
The scientific literature linking sodium intake to blood pressure is extensive and dates back more than 100 years. Populations with a high average salt intake have a higher average blood pressure and higher levels of hypertension (high blood pressure).

Reducing the amount of salt you have will lower high blood pressure – the extent depends on your age and blood pressure. People with high blood pressure, diabetes or chronic kidney disease, and those who are older or overweight, are particularly susceptible to the effect of too much sodium on blood pressure. However, sodium reduction may not lower blood pressure in younger people with low or normal blood pressure.

High sodium intake and other health conditions
Excessive sodium intake has also been linked to other conditions, such as:

  • Heart failure

  • Kidney problems and kidney stones

  • Oedema

  • Stroke

  • Gastric cancer

  • Left ventricular hypertrophy

  • Osteoporosis.

A high level of salt intake increases the amount of calcium excreted in the urine, which may also contribute to osteoporosis and increased risk of fracture.

The balance of sodium and water in the body can also be disrupted if there is not enough water. This may be caused by a damaged thirst mechanism or by limited access to water.
Hypernatremia is a very serious condition that occurs when your sodium levels rise above 145mEq/L. It can lead to death. A major symptom is thirst and treatment usually involves controlled water replacement.
Salt loss is rare but can be dangerous
The body loses salt through urine, perspiration, vomiting and diarrhoea. If too much salt is lost, the level of fluid in the blood will drop.
Hyponatremia is a condition that occurs when the sodium in your blood falls below the normal range of 135–145 milliequivalents per litre (mEq/L). In severe cases, low sodium levels in the body can lead to muscle cramps, nausea, vomiting and dizziness. Eventually lack of salt can lead to shock, coma and death.

Severe salt loss is very unlikely to happen because our diets contain more than enough salt. The only time this is likely to occur is when someone has acute gastroenteritis (causing vomiting and diarrhoea), severe sweating or water intoxication (from drinking too much water).

Muscle cramps need water not salt
Some people believe that salt has to be replaced during hot weather or strenuous exercise to avoid muscle cramps. This is not correct. What you need to replace is water. The human body can happily survive on just one gram of salt a day, as hormones keep a check on sodium levels and make adjustments for hot weather. A genuine sodium shortage brought on by hot weather or exercise is extremely rare, even among hard-working athletes.

The muscle cramps that sometimes follow a bout of sweating are due to dehydration, not lack of salt. To prevent cramps, drink plenty of water on hot days and before, during and after exercise. This will also help to even out the water–sodium ratio in the body.

Sodium and potassium in the body
Potassium is important for the nerves, muscles and heart to work properly. It also helps to lower blood pressure. However, some people with kidney disease, or who are taking some medications, need to be careful not to get too much potassium in their diet.

Our bodies are designed for a high potassium diet, not a high salt diet. Food processing tends to lower the potassium levels in many foods while increasing the sodium content. So it is better to eat unprocessed foods such as fruit, vegetables, wholegrain breads and cereals. Foods high in potassium include bananas, apricots, mushrooms and spinach.

Sodium in food
Many foods – whole grains, meat and dairy products – naturally contain traces of sodium, while processed foods tend to contain a lot of salt. Some foods contain higher amounts of salt than you may expect. For example:

  • A jam sandwich has approximately 30 per cent less salt that a marmite sandwich because most of the salt comes from the bread.

  • Sea salt, onion, celery or garlic salts are not low sodium substitutes.

  • A bowl of cornflakes has about the same amount of salt as a small packet of plain chips.

  • Some sweet biscuits contain as much or more salt than savoury biscuits.

  • Ricotta, cottage, mozzarella and Swiss cheeses are lower in salt than most other cheeses.

Reducing salt in our diet
Some suggestions for reducing the amount of salt in our diet include:

  • Avoid adding salt to cooking and at the table.

  • Choose reduced salt bread and breakfast cereals – bread is a major source of sodium in the diet.

  • Avoid high salt foods.

  • Cut back on processed foods.

  • Cut back on takeaway and fast foods.

  • Buy fresh vegetables rather than canned.

  • Buy ‘low salt’ (contains less than 120mg/100g) or ‘salt free’ versions of commonly used foods, such as commercial sauces.

  • Use herbs and spices such as garlic, oregano and lemon juice to add flavour to meals.

Fortunately, nutrition labels on food packaging now make this a lot easier. Nutritional information labels are usually on the back of the packaging. Look at the figure for salt per 100g:

  • High is more than 1.5g salt per 100g (or 0.6g sodium). May display a red traffic light.

  • Low is 0.3g salt or less per 100g (or 0.1g sodium). May display a green traffic light.

Many foods also display information on the salt content on the front of the packaging. This may show the salt content as a percentage of your Guideline Daily Amount, or display a traffic light to show whether the food is low, medium or high in salt. Where traffic lights are used, red means high: leave these foods for an occasional treat, and aim to eat mainly foods that are green or amber.

If the amount of salt per 100g is in between 0.3g and 1.5g, that is a medium level of salt, and the packaging may display an amber traffic light.

Some people believe that sea salt is a healthier alternative to normal table salt, but both are composed of sodium chloride.

Avoid processed foods
High salt foods that should be eaten sparingly include:

  • Most ‘fast’ foods, such as pizza

  • Most snack foods, such as potato chips

  • Processed meats, such as sausages, salami, hot dogs and luncheon meats

  • Canned vegetables

  • Dehydrated or packet foods, such as instant pasta or soups

  • Pre-packaged sauces and condiments, such as tomato sauce and soy sauce, and processed tomato products in general

  • White bread and bread rolls.

Iodine
Our bodies need iodine to make sure our thyroid gland and the hormones that regulate our metabolism work normally. Iodised salt is probably the most common source of iodine for Australians and can provide enough iodine to avoid low thyroid activity. Another good way to make sure you get enough iodine is to eat seafood at least once a week.

This is especially important for pregnant women, who may need a dietary supplement, as low iodine may cause intellectual disability for the child. However, some types of fish contain high levels of mercury, which is dangerous to a developing foetus. Take care when choosing the types of fish you eat during pregnancy to reduce this risk.

Vegetarians or people who do not eat seafood can get iodine from multivitamin supplements.

Things to remember

  • Salt is needed by the body to help regulate fluid levels.

  • You don't have to add salt to food to be eating too much: 75% of the salt we eat is already in food when we buy it.

  • A diet high in salt has been linked to high blood pressure.

Posted by: Ronald AT 12:19 pm   |  Permalink   |  Email
Monday, November 07 2011

“I tend to forget drinking water even when it’s hot, and you expect me to remember to do that when it’s cold?”

Odds are that something similar came across your mind when you read the headline. No wonder – we are very good at forgeting that we need to drink water. Even if we are dying of thirst, there is a good chance we won’t even notice it.

Everyone tells us that when it’s hot, we should drink plenty of water. And while they’re right, that same rule applies to the times when it’s cold. In winter, our water balance is easy to disrupt, if we don’t know what to do.

Although you may have heard that a million times, make it a habit to drink water. It’s for your own good. Even drinking tap water is a great deal better than not drinking any water. Be sure that your health is getting a lot of value for your money.

But why do we have to drink water in the winter? What you are maybe forgetting is that our body needs water for many purposes. Cooling down itself is only one of them. You need water to remove toxic waste from your body and  to transport minerals in and out of the cells… just to name a few. You need to drink 1 galon of water every day no matter if it’s winter or summer. Your body will need this water to keep itself running.

What happens if you don’t drink any water? The body takes that as a sign, that you are living in an enviroment in which there is little water. So it cuts down on its use. This makes you perform worse than normal, but at least you are alive.

If you start drinking plenty of water, you will teach your body that there really is enough for it to keep going. After a few days, you will start getting thirsty more and more often. Your body will be working at full speed.

So basically, we get enough water to survive from the food we eat. But if we are to feel energetic and good about ourselves, we need to drink water no matter if it’s summer of winter.

Posted by: Sofem AT 03:42 am   |  Permalink   |  Email
Tuesday, October 18 2011

Restrictive dieting sends a signal to the body that there is a food shortage, and the body thinks its survival is threatened. It responds by slowing down its metabolic rate (the speed at which the body burns up energy). This means that body fat loss slows down and it becomes harder to lose weight.

Dieting makes the body respond by conserving fat. When dieting, weight loss is mainly water and muscle. The reduced muscle mass further slows down the rate at which the body uses up energy.

Research shows that people find it more and more difficult to lose weight after repeated dieting, and they rapidly regain weight. Over 90 per cent of dieters regain the weight they lost after they stop dieting, and often regain more weight than they started with.

Weight fluctuations increase the risk of heart disease. It is healthier to stabilise at a heavier weight than repeatedly gain and lose weight. Dieting deprives the body of essential nutrients and energy, and the body responds by wanting to binge. Strict avoidance of particular foods can cause cravings for those foods.

Women need to carry 25-30 per cent body fat for health and fertility. Genetics has a significant influence on each person’s metabolic rate, body shape and size, so dieting is not the only answer.

Basal metabolic rate (BMR)
The body uses up energy according to its basal metabolic rate, and is influenced by exercise and food intake.

The BMR is the rate at which the body burns up energy to breathe, keeps blood flowing around the body, and maintains body temperature. About two-thirds of the energy used by the body each day is used by the BMR.

BMR varies between people
People with a low BMR are ‘energy savers’, and do not use as much energy for the same body functions as people with a high BMR. Those with a low BMR are more likely to have excess energy to store as fat.

BMR can be changed
The goal for people wanting to lose weight is to increase their BMR, and thus become an ‘energy user’ - where the body uses up more energy for body functions.

Physical activity
Physical activity is the second-largest use of your energy. It is the energy used to move muscles during the day, for example, walking, reading, swimming, cleaning, gardening, and this energy expenditure varies a lot from person to person.

Food
The body uses energy to digest, absorb and convert the food eaten. The type of food eaten affects how much energy the body needs to use up to break down and convert the food. High carbohydrate or starchy foods require more energy to use up than high protein or fatty foods.

What happens to BMR when dieting?
The BMR slows down when the number of kilojoules eaten in food is reduced (as is the case with most weight-loss diets). The body thinks ‘hard times are coming, food seems less plentiful; I’d better start saving energy’. Thus the body becomes an ‘energy saver’. One way the body does this is by breaking down body tissue that needs energy just to exist - your muscle and organs.

The BMR drops, the body gets used to and needs less food. If a person stays on a low kilojoule diet for any length of time, they end up eating a very small amount of food just to maintain weight.

This style of eating is not very satisfying and a person soon begins to eat more. As soon as the body gets more food it says to itself, ‘Whoopee — a bit extra! I’ll save it for a rainy day’, and stores it as fat. Eventually, the body gets back to the weight it was before dieting started, often with a few more kilograms added.

People often don’t realise that they now have more fat and less muscle than when they started dieting (the fat goes back, not the muscle — the only way to get muscle back is through exercise).

People will then try another diet, lose some more weight, then regain it all plus extra; and end up being heavier still. This vicious cycle is called the ‘yo-yo syndrome’ and may result in dramatic changes in the body make up (more fat, less muscle), plus a very low BMR. (Remember, a low BMR means it is easier to gain weight.)

Remember - Fat needs no energy to exist - it just sits there!. So a lot of the weight lost on a diet is not fat, but muscle.

That's why at Gym In Motion, we believe in a lifestyle change which is a long term approach to nutrition and not one off dieting fads.

Posted by: Ronald AT 02:03 am   |  Permalink   |  Email

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