Being active reduces Alzheimer's risk

May, 2012

A large study provides evidence that higher levels of everyday activity help prevent Alzheimer’s, although more intense activity is even better.

A four-year study involving 716 elderly (average age 82) has revealed that those who were most physically active were significantly less likely to develop Alzheimer’s than those least active. The study is unique in that, in addition to self-reports of physical and social activity, activity was objectively measured (for up to 10 days) through a device worn on the wrist. This device (an actigraph) enabled everyday activity, such as cooking, washing the dishes, playing cards and even moving a wheelchair with a person's arms, to be included in the analysis.

Cognitive performance was assessed annually. Over the study period, 71 participants (10%) developed Alzheimer’s.

The study found that those in the bottom 10% of daily physical activity were more than twice as likely (2.3 times) to develop Alzheimer's disease as those in the top 10%. Those in the bottom 10% of intensity of physical activity were almost three times (2.8 times) as likely to develop Alzheimer's disease as people in the top 10%.

Moreover, the level of activity was associated with the rate of cognitive decline.

The association remained after motor function, depression, chronic health conditions, and APOE gene status were taken into account.

The findings should encourage anyone who feels that physical exercise is beyond them to nevertheless engage in milder forms of daily activity.

 

Addendum:

Another recent study, involving 331 cognitively healthy elderly, has also found that higher levels of physical activity were associated with better cognitive performance (specifically, a shorter time to complete the Trail-making test, and higher levels of verbal fluency) and less brain atrophy. Activity levels were based on the number of self-reported light and hard activities for at least 30 minutes per week. Participants were assessed in terms of MMSE score, verbal fluency, and visuospatial ability.

Reference: 

Related News

A Finnish study involving 338 older adults (average age 66) has found that greater muscle strength is associated with better cognitive function.

Data from over 11,500 participants in the Atherosclerosis Risk in Communities (ARIC) cohort has found evidence that orthostatic hypotension in middle age may increase the risk of cognitive impairment and dementia 20 years later.

A review of 39 studies investigating the effect of exercise on cognition in older adults (50+) confirms that physical exercise does indeed improve cognitive function in the over 50s, regardless of their cognitive status.

A Canadian study involving 40 older adults (59-81), none of whom were aware of any major memory problems, has found that those scoring below 26 on the Montreal Cognitive Assessment (MoCA) dementia screening test also showed shrinking of the anterolateral

A study involving 35 adults with

In Australia, it has beens estimated that 9% of people aged over 65, and 30% of those aged over 85 have dementia. However, these estimates are largely based on older data from other countries, or small local samples.

In the past few months, several studies have come out showing the value of three different tests of people's sense of smell for improving the accuracy of

A study comparing the language abilities of 22 healthy young individuals, 24 healthy older individuals and 22 people with

Following on from a previous study showing that such a virtual supermarket game administered by a trained professional can detect

Data from the Women's Health Initiative Memory Study, involving 6,467 postmenopausal women (65+) who reported some level of caffeine consumption, has found that those who consumed above average amounts of coffee had a lower risk of developing dementia.

Pages

Subscribe to Latest newsSubscribe to Latest newsSubscribe to Latest health news