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  • More steps reduce risk...

More steps reduce risk of dementia, cognitive impairment among older women

Written By : Dr. Kamal Kant Kohli Published On 2023-02-01T10:00:15+05:30  |  Updated On 1 Feb 2023 1:06 PM IST
More steps reduce risk of dementia, cognitive impairment among older women
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USA: Older women who did more daily walking and moderate-to-vigorous physical activity are less likely to develop dementia or mild cognitive impairment, a recent study in Alzheimer’s & Dementia journal has revealed.

The Herbert Wertheim School of Public Health and Human Longevity Science led the study at the University of California San Diego.

The team reported that, among women aged 65 or older, each additional 31 minutes per day of moderate-to-vigorous physical activity was associated with 21 percent lower risk of developing mild cognitive impairment or dementia. The risk was also 33 percent lower with each additional 1,865 daily steps.

“Given that the onset of dementia begins 20 years or more before symptoms show, the early intervention for delaying or preventing cognitive decline and dementia among older adults is essential,” said senior author Andrea LaCroix, Ph.D., M.P.H., Distinguished Professor at the Herbert Wertheim School of Public Health and Human Longevity Science at UC San Diego.

While there are several types, dementias are debilitating neurological conditions that can cause loss of memory, the ability to think, problem solve or reason. Mild cognitive impairment is an early stage of memory loss or thinking problems that is not as severe as dementia.

According to the United States Department of Health and Human Services, dementia affects more than 5 million people in this country. That number is expected to double by 2050.

More women live with and are at higher risk of developing dementia than men.

“Physical activity has been identified as one of the three most promising ways to reduce risk of dementia and Alzheimer’s disease. Prevention is important because once dementia is diagnosed, it is very difficult to slow or reverse. There is no cure,” said LaCroix.

However, because few large studies have examined device measures of movement and sitting in relation to mild cognitive impairment and dementia, much of the published research on the associations of physical activity and sedentary behavior with cognitive decline and dementia is based on self-reported measures, said first author, Steve Nguyen, Ph.D., M.P.H., postdoctoral scholar at the Herbert Wertheim School of Public Health.

For this study, the researchers sampled data from 1,277 women as part of two Women’s Health Initiative (WHI) ancillary studies — the WHI Memory Study (WHIMS) and the Objective Physical Activity and Cardiovascular Health (OPACH) study. The women wore research-grade accelerometers and went about their daily activities for up to seven days to obtain accurate measures of physical activity and sitting.

The activity trackers showed the women averaged 3,216 steps, 276 minutes in light physical activities, 45.5 minutes of moderate-to-vigorous physical activity and 10.5 hours of sitting per day. Examples of light physical activity could include housework, gardening or walking. Moderate-to-vigorous physical activity could include brisk walking.

The study findings also showed that higher amounts of sitting and prolonged sitting were not associated with a higher risk of mild cognitive impairment or dementia.

This information has clinical and public health importance as there is little published information on the amount and intensity of physical activity needed for lower dementia risk said Nguyen.

“Older adults can be encouraged to increase the movement of at least moderate intensity and take more steps each day for a lower risk of mild cognitive impairment and dementia,” said Nguyen.

“The findings for steps per day are particularly noteworthy because steps are recorded by various wearable devices increasingly worn by individuals and could be readily adopted.”

Reference:

Steve Nguyen, Andrea Z. LaCroix, Kathleen M. Hayden, Chongzhi Di, Priya Palta, Marcia L. Stefanick, JoAnn E. Manson, Stephen R. Rapp, Michael J. LaMonte, John Bellettiere. Accelerometer‐measured physical activity and sitting with incident mild cognitive impairment or probable dementia among older women. Alzheimer's & Dementia, 2023; DOI: 10.1002/alz.12908

Alzheimerstepsphysical activitydementiacognitive declinecognitive impairment
Source : Alzheimer's & Dementia
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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