Any exercise that gets the heart pumping may reduce the risk of dementia and slow the condition’s progression once it starts, reported a Mayo Clinic study.
Researchers examined the role of aerobic exercise in preserving cognitive abilities and concluded that it should not be overlooked as an important therapy against dementia. The results of this study were published this month in Mayo Clinic Proceedings.
They broadly defined exercise as enough aerobic physical activity to raise the heart rate and increase the body’s need for oxygen. Examples include walking, gym workouts and activities at home such as raking leaves.
Research on Exercise and Cognition
"We culled through all the scientific literature we could find on the subject of exercise and cognition, including animal studies and observational studies, reviewing over 1,600 papers, with 130 bearing directly on this issue. We attempted to put together a balanced view of the subject," says J. Eric Ahlskog, M.D., Ph.D., a neurologist at Mayo Clinic.
"We concluded that you can make a very compelling argument for exercise as a disease-modifying strategy to prevent dementia and mild cognitive impairment, and for favorably modifying these processes once they have developed." Dr. Ahlskog explains.
The researchers note that brain imaging studies have consistently revealed evidence of favorable effects of exercise on human brain integrity.
Also, they note, animal research has shown that exercise generates trophic factors that improve brain functioning, plus exercise facilitates brain connections (neuroplasticity).
Exercise for General and Cognitive Health
"Whether addressing our patients in primary care or neurology clinics, we should continue to encourage exercise for not only general health, but also cognitive health," Dr. Ahlskog says.
More research is needed on the relationship between exercise and cognitive function, the study’s authors say, but they encourage exercise, in general, especially for those with or worried about cognitive issues.
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Reference: Mayo Clinic Proceedings. Published Online September 2011.
“Physical Exercise as a Preventive or Disease-Modifying Treatment of Dementia and Brain Aging,” J. Eric Ahlskog, PhD, MD, Yonas E. Geda, MD, MSc, Neill R. Graff-Radford, MBBCh, FRCP, and Ronald C. Petersen, PhD, MD
Author Affiliations: From the Department of Neurology (J.E.A., R.C.P.), Department
of Psychiatry and Psychology (Y.E.G.), and Department of Health Sciences Research (Y.E.G., R.C.P.), Mayo Clinic, Rochester, MN; and Department of Neurology, Mayo Clinic, Jacksonville, FL (N.R.G.-R.).