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Exercise
Keeps Older
People's Brains in Shape
Excerpt
By
Charnicia E. Huggins,
Reuter's
Health
NEW YORK (Reuters Health) - Active octogenarians appear to be
more focused and less easily distracted than their sedentary peers,
study findings suggest.
"By leading an active, involved lifestyle, you may be able to maintain
your ability to think and react to situations well into late life,"
study author Dr. Walter R. Bixby, of the University of Maryland
in College Park, told Reuters Health.
"This is especially important for getting through tasks of daily
living when one considers driving, walking down the street with
groceries, following directions, etc.," he added.
To investigate the association between physical activity and
brain function, Bixby and his colleagues studied 106 seniors whose
average age was 80. The seniors completed a survey about the amount
of time they spent each week participating in five physical activities--vigorous
activity, leisure walking, moving, standing, and sitting--and
afterwards took part in a test of their focusing abilities.
The investigators found that those who participated in higher
levels of physical activity scored higher on the test, meaning
they were better able to focus on the task at hand despite surrounding
distractions, than the less-active seniors.
Further, Bixby noted that the patients were not extremely physically
fit. Thus, "a moderate level of physical activity, not necessarily
an exercise training plan per se, but just doing something, may
lead to improvements in one's cognitive ability," he said.
In light of the findings, "the main recommendation for anyone
young or old, would be to try and incorporate some form of physical
activity into your life," Bixby said. "Also, try and keep your
mind active by reading, doing crosswords, or trying to learn new
or different materials."
In a second study, Sean Deeny, a doctoral student at the University
of Maryland, also investigated the effect of physical activity
on brain functioning in a group of 36 men and women aged 66 to
89. For his study, Deeny used brain scans to measure inhibitory
function--meaning the ability to focus on one thing over another.
He and his colleagues found that a higher level of physical
activity was associated with better focusing abilities, but only
among men.
There are several possible ways that physical exercise could
help preserve brain functioning, Deeny said. For example, "higher
cardiovascular fitness may cause more blood flow and oxygenation
in the brain."
Because of his team's findings, Deeny said his future research
will include individuals who are genetically susceptible to Alzheimer's
disease, to determine whether any relationships exist between
their physical activity levels and brain functioning.
In the meantime, he advises that individuals "stay physically
and mentally active." Deeny added, "Healthy body, healthy mind."
The findings of both studies were presented recently at the
North American Society for Psychology of Sport and Physical Activity
Conference in Hunt Valley, Maryland.
Reference
Source 89
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