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Science Forum Index » Medicine - Cancer Forum » Two more reasons to exercise, studies find
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| Roman Bystrianyk |
 Posted: Tue Dec 12, 2006 9:14 am |
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"Two more reasons to exercise, studies find", Reuters, December 11,
2006,
Link: http://www.alertnet.org/thenews/newsdesk/N11223052.htm
Here are two more reasons to exercise: It may help prevent breast
cancer and can be a safer way to lose weight than dieting, doctors said
on Monday.
One report from the Mayo Clinic College of Medicine in Rochester,
Minnesota, said a study of women aged 55 to 69 found that those with
the highest physical activity levels when the study began had a 14
percent lower risk of developing breast cancer than those who got low
levels of exercise.
The multiyear study, which ended in 2003, involved more than 36,000
women.
While the mechanism involved is not clear it may be that exercise
reduces body fat, the major source of estrogen in post-menopausal
women, the study said. That could lead to fewer tumors of a type called
estrogen receptor positive/progesterone receptor negative, which are
typically more aggressive, added the report.
"Further studies are needed to confirm these novel findings, and to
evaluate similar relationships among premenopausal women," concluded
the report published in the Archives of Internal Medicine.
"If found to be causally related to breast cancer, physical activity
would have a substantial public health effect on the prevention of this
disease, along with its other positive health benefits," it added.
In another study published in the same journal, doctors at Washington
University School of Medicine in St. Louis found that people who slim
down by cutting calories may also be losing bone density -- something
that does not happen if weight loss comes through exercise.
Loss of bone density can lead to osteoporosis and fractures later in
life.
That finding was based on a look at 48 adults involved variously in
weight loss by caloric restrictions or exercise.
"A common explanation given for the bone loss induced by weight loss is
reduction in mechanical stress on the weight-bearing skeleton (the hip
and spine)," the report said.
But when muscles pull on bones during exercise it is thought to produce
strains in the skeleton that stimulate new bone production, the
researchers said.
"These findings have important implications in designing an appropriate
weight-loss therapy program in middle-aged adults, particularly in the
subset of patients who may already be at increased risk for bone
fracture," the study concluded. |
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| I.P. Freely |
| Posted: Tue Dec 12, 2006 9:03 pm |
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Roman Bystrianyk wrote:
Quote: "Two more reasons to exercise, studies find", Reuters
Then there's the 3-7 years' extra longevity, the dramatically improved
QOL, reduced falls, the improved digestive function, the greatly
lessened incidence and severity of dementia, the sheer FUN of it -- to
the point of altered states of consciousness for millions of us -- if
the exercise is PLAY rather than "WORKing out", reduced insurance costs,
eating virtually all one wants, and on and on and on and on.
I.P. |
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