Tag Archives: Obesity

Government, Health, Medical, Research, Science, Society

Health risk for women in their 30s who do not exercise…

HEART RISK

A major study has found that a lack of exercise puts younger women at far greater risk of heart attacks than smoking or being obese.

Researchers found inactive women in their 30s are almost 50 per cent more likely to develop heart disease in their lifetime than those who are fit.

The team has now called on governments to launch public health campaigns on the importance of exercise, arguing it would have a far greater impact on reducing heart disease deaths than drives to discourage smoking or promote healthy eating.

The scientists looked at the records of 32,541 women aged 22 to 90, including details about lifestyle and whether they had heart disease. Armed with this data, they used a mathematical formula to work out their risk of heart disease during their lifetime based on whether they were inactive, were smokers, had hypertension (high blood pressure) or were obese.

A lack of exercise was found to pose the greatest risk to women across all age groups.

Those in their early 30s who were classed as inactive were nearly 50 per cent more likely to suffer from the condition in their lifetime than active women.

The risk decreased slightly with age. Inactive women in their late 40s were 38 per cent more at risk, falling to 28 per cent in the late 50s.

By comparison, the risk was 40 per cent for women smokers in their 30s and 30 per cent for the obese. Although obesity and being unfit are closely linked, the researchers from the University of Queensland pointed out that many slim women are inactive.

The latest UK figures show a quarter of women are classified as inactive, while just over half do the recommended two and a half hours of physical activity a week.

Heart disease, which includes heart attacks and strokes, is by far the biggest killer in Britain, claiming 82,000 lives a year.

Experts have previously claimed that exercising can halve the risk of getting the condition because it lowers the blood pressure, reduces cholesterol which blocks arteries, and improves circulation.

Professor Wendy Brown, one of the team’s lead researchers, described inactivity as the ‘Cinderella risk factor’ for heart disease. She said: ‘Our data suggests that national programmes for the promotion and maintenance of physical activity across the adult lifespan, but especially in young adulthood, deserve to be a much higher public health priority for women than they are now.’

The study’s findings, first published in the British Journal of Sports Medicine, concluded: ‘Continuing efforts to reduce smoking rates in young adult women are warranted… however, from about age 30, the population attributable risk for inactivity outweighs that of the other leading risk factors, including high Body Mass Index, which is currently receiving much more attention.’

A spokesperson for the British Heart Foundation, said: ‘We already know physical inactivity is a major risk factor for heart disease. Interestingly, this study shows its dominant influence on heart disease amongst women, and suggests a greater need to promote regular physical activity… It is important to remember that heart disease is linked to other factors such as smoking, obesity, high blood pressure and high cholesterol.’

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Health, Medical, Research, Science

Obesity and the risk of having brittle bones…

RESEARCH AT HARVARD OVERTURNS TRADITIONAL THINKING

According to recent research, being very overweight could put you at risk of brittle bones.

Up until now scientists had thought that carrying a few extra pounds helped to protect bones and prevent fractures.

The researchers believe that instead of protecting bones, the extra fat triggers the formation of cells called osteoclasts which gradually wear them down. They also suspect that if large amounts of fat are stored within the bone it inhibits the production of new bone tissue.

Scientists had assumed that being obese protected bones as fat cells release the hormone oestrogen. This is known to encourage bones to absorb the mineral calcium from the diet, which makes them stronger.

But in the past few years a growing number of studies have dispelled this theory by showing that very overweight adults tend to have thinner bones and a lower bone density.

This latest study by academics at Harvard University in Boston has suggested a cause by claiming that high levels of fat in the bones gradually wear them down.

The research-lead on this study at Harvard Medical School, associate professor Miriam Bredella, said:

… Obesity was once thought to be protective against bone loss. We have found that this is not true. Bone marrow fat makes bones weak. If you have a spine that’s filled with fat, it’s not going to be as strong.

Her study – first published in the journal Radiology – looked at the bones and fat deposits of 106 obese men and women. The researchers used a type of scan called proton magnetic resonance spectroscopy to measure fat in the bone marrow, muscles and liver.

They found that adults with the most fat in their liver and muscles also had the highest levels of fat in their bone marrow, which increases the risk of osteoporosis.

More than three million people in Britain suffer from the disease for which there is no cure.

And in further developments, children as young as eight are showing signs of high blood pressure due to obesity.

Campaigners say these children are putting themselves at high risk of strokes, heart attacks and liver disease in adulthood and should watch their weight and salt intake.

Harvard academics looked at blood pressure readings, weights and diets of 8,300 children aged eight to 17 surveyed between 1999 and 2008. They compared their average results with those of a group of 3,200 similar-aged children who were studied from 1988 to 1994.

Girls in the most recent group were 53 per cent more likely to have higher than normal blood pressure. Some 12.6 per cent had higher than normal readings compared to 8.2 per cent of those surveyed earlier.

The proportion of boys with higher blood pressure rose from 15.8 per cent to 19.2 per cent, an increase of 21 per cent.

British scientists expect the US results would prove to be similar here as so many children are now obese.

A statement issued by the British Heart Foundation, said:

… It’s a real concern to see raised levels at such a young age. Unhealthy habits formed in childhood can be hard to shake off.

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