Exercise a Defense Against Dementia: Study

MONDAY, Feb. 13 (HealthDay News) — Here’s another reason to get into
shape: Physical activity may reduce the risk of dementia-related death,
according to a new study.

Researchers assessed the health of more than 45,000 men and nearly
15,000 women, ages 20 to 88 years, in the United States and grouped them
into one of three fitness categories — low, middle or high.

After an average follow-up of 17 years, about 4,050 participants died.
Of those deaths, 164 were attributed to dementia (72 vascular dementia and
92 Alzheimer’s disease). Of those 164 deaths, 123 of the people were in
the low-fitness group, 23 were in the middle-fitness group, and 18 were in
the high-fitness group.

People in the high- and medium-fitness groups had less than half the
risk of dying as those in the low-fitness group, the researchers
concluded.

The study appears in the February issue of the journal Medicine
Science in Sports Exercise
.

“These findings support physical-activity promotion campaigns by
organizations such as the Alzheimer’s Association and should encourage
individuals to be physically active,” study author Riu Liu said in a
journal news release.

“Following the current physical-activity recommendations from the
American College of Sports Medicine will keep most individuals out of the
low-fit category and may reduce their risk of dying with dementia,” Liu
added.

Liu conducted the study as part of her dissertation at the University
of South Carolina. She is now a postdoctoral fellow at the U.S. National
Institute of Environmental Health Sciences.

While deaths in the United States associated with heart disease, breast
cancer and stroke have declined in recent years, deaths related to
dementia and Alzheimer’s rose 46 percent between 2002 and 2006, according
to the release.

The study doesn’t prove that exercise will prevent dementia, however.
Other factors may also come into play.

More information

The U.S. National Institute of Neurological Disorders and Stroke has
more about dementia.

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