Variety of leisure and physical activities rather than intensity in calorie expenditure may reduce risk for dementia in older people

Variety of leisure and physical activities rather than intensity in calorie expenditure may reduce risk for dementia in older people, according to an article in the April issue of the American Journal of Epidemiology.

General physical activity is already known to enhance cardiovascular health and help maintain independence and quality of life in older people, but the results of this study - which establish a statistical association, and not a direct cause and effect, between variety of exercise and reduced dementia risk -- suggest that participating in a number of different activities may be as or more important than frequency, duration, and intensity of physical activity with respect to dementia risk.

“We don’t yet know why this association exists or what causes it. It could well be that maintaining a variety of activities keeps more parts of the brain active, or that this variety reflects better engagement in both physical and social activities.

onfirmation of this association in future studies may provide an additional impetus for people to remain or become engaged in several physical and other leisure activities later in life,” said Constantine G. Lyketsos, MD, senior author on the report.
The study included 3,375 men and women age 65 years or older who participated in the Cardiovascular Health Cognition Study from 1992 to 2000 and who did not have dementia at baseline. Each study volunteer was asked to fill out a questionnaire about the frequency and duration of the 15 most common types of physical activity in older adults, including walking, household chores, mowing, raking, gardening, hiking, jogging, biking, exercise cycling, dancing, aerobics, bowling, golfing, general exercise and swimming. The researchers then created an activity index, calculated as the number of different activities each subject participated in over the previous two weeks. Other measurements, including APOE genotype, age, gender, education level, ethnicity, smoking, alcohol use, and other physical and mental health-related history, were also considered in the study.

The researchers found 480 new cases of dementia over an average of 5.4 years of follow-up. Among these, dementia occurred less frequently in those participating in more activities relative to those who participated in fewer activities (one or no activity had 130 cases, two activities had 152 cases, three activities had 113 cases, four or more activities had 84 cases). The association held true for all types of dementia, including Alzheimer’s disease and vascular dementia. The association did not hold true for people with the APOE-4 genotype.

“These findings, taken together with recent findings from our colleagues at the University of Chicago studying physical activity and plaque buildup in the brains of mice with Alzheimer’s (published this year in the journal Cell) provide a good picture from basic and clinical science of how activity and exercise work to reduce the risk of dementia,” said Lyketsos.


DOLについて - 利用規約 -  会員規約 -  著作権 - サイトポリシー - 免責条項 - お問い合わせ
Copyright 2000-2025 by HESCO International, Ltd.