Study hails walking - March-16-13
Study hails walking
A brisk 30-minute walk six days a week is enough to trim waistlines and
cut the risk of metabolic syndrome — an increasingly common condition
that is linked to obesity and a sedentary lifestyle, a new study
indicates.
It’s estimated that about one
quarter of all US adults have metabolic syndrome — a cluster of risk
factors that raise the odds of developing heart disease, diabetes and
stroke. To be diagnosed with metabolic syndrome, a person must have at
least three of these five risk factors — a large waistline, high blood
pressure, high levels of harmful triglycerides, low levels of ‘good’ HDL
cholesterol, and high blood sugar — and according to many studies, a
growing number of people have these problems.
The new findings
stem from the STRRIDE study — an acronym for Studies of a Targeted Risk
Reduction Intervention through Defined Exercise — in which investigators
examined the effects of varying amounts and intensity of exercise on
171 middle-aged, overweight men and women.
Before exercising
regularly, 41 percent of the study subjects met the criteria for
metabolic syndrome. At the end of the 8-month exercise program, only 27
percent did.
“That’s a significant decline in prevalence,” said
Johnson. “It’s also encouraging news for sedentary, middle-aged adults
who want to improve their health. It means they don’t have to go out
running 4 or 5 days a week; they can get significant health benefits by
simply walking around the neighborhood after dinner every night.”
People
in the study who exercised the least - walking 30 minutes 6 days a week
or the equivalent of about 11 miles per week — gained significant
benefit, while those who exercised the most, jogging about 17 miles per
week, gained slightly more benefit in terms of lowered metabolic
syndrome scores.
People who did a short period of very vigorous
exercise didn’t improve their metabolic syndrome scores as much as those
who performed less intense exercise for a longer period, the
researchers found. This suggests, they say, that there’s more value in
doing moderate intensity exercise every day rather than more intense
activity just a few days a week.
All of the exercisers lost
inches around their waistline over the 8-month study period, whereas the
inactive control group gained an average of about one pound and a
half-inch around the waist. “That may not sound like much, but that’s
just 6 months. Over a decade, that’s an additional 20 pounds and 10
inches at the belt line,” noted Duke cardiologist Dr William E Kraus,
the study’s principal investigator. reuters
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