brand logo

Am Fam Physician. 2016;94(3):242

Author disclosure: No relevant financial affiliations.

Clinical Question

Do formal exercise programs improve functioning in activities of daily living (ADLs) in patients with dementia?

Evidence-Based Answer

Exercise programs lasting at least two months moderately increase the ability of patients with dementia to perform ADLs. (Strength of Recommendation: A, based on systematic reviews of randomized controlled trials [RCTs].)

A 2015 Cochrane review of six RCTs (N = 289) involving patients older than 65 years who had been diagnosed with dementia assessed the effect of exercise on cognitive, neuropsychiatric, behavioral, and ADL outcomes.1 Dementia was diagnosed using criteria from the Diagnostic and Statistical Manual of Mental Disorders, 4th ed., the National Institute of Neurological and Communicative Disorders and Stroke, and the Alzheimer's Disease and Related Disorders Association. Exercise programs ranged from seven to 52 weeks and consisted of aerobic, strengthening, and balancing activities. Control groups received no additional intervention or were engaged in social activities only. Investigators assessed ADLs using the Barthel Index of Activities of Daily Living, the Katz Index of Independence in Activities of Daily Living, and the Changes in Advanced Dementia Scale. Higher scores indicated better performance; a standard mean difference (SMD) of 0.2 is considered small, 0.6 moderate, and 1.2 large. Patients in the exercise groups scored moderately better than those in the control groups (SMD = 0.68; P = .03). There was statistical heterogeneity among the six trials because of differences in dementia severity and type, and the duration, frequency, and type of exercise. Despite these differences, the intervention group in each study showed improvement in the performance of ADLs.

A 2014 systematic review examined the effect of physical exercise on ADL performance.2 The authors included six RCTs with 446 patients who were diagnosed with Alzheimer disease and underwent a regimented exercise program of walking, stretching, strength/resistance training, balance exercises, and aerobics/endurance programs for 12 weeks to 12 months. Control groups received only routine medical care. Four of the studies were also included in the Cochrane review discussed previously. Exercise moderately improved performance of ADLs (SMD = 0.80; P < .001). Program duration (12 weeks to six months) and adherence were associated with greater improvements in ADL scores and larger effect size. Adherence was measured and reported by the patient's caregiver, physical therapist, or occupational therapist. The program with the largest effect size consisted of walking and aerobics for 30 minutes per day, four times per week for six months. The study with the longest intervention (12 months) did not produce a large effect size.

Copyright Family Physicians Inquiries Network. Used with permission.

Help Desk Answers provides answers to questions submitted by practicing family physicians to the Family Physicians Inquiries Network (FPIN). Members of the network select questions based on their relevance to family medicine. Answers are drawn from an approved set of evidence-based resources and undergo peer review. The strength of recommendations and the level of evidence for individual studies are rated using criteria developed by the Evidence-Based Medicine Working Group (https://www.cebm.net).

The complete database of evidence-based questions and answers is copyrighted by FPIN. If interested in submitting questions or writing answers for this series, go to https://www.fpin.org or email:  questions@ fpin.org.

This series is coordinated by John E. Delzell Jr., MD, MSPH, associate medical editor.

A collection of FPIN’s Help Desk Answers published in AFP is available at https://www.aafp.org/afp/hda.

Continue Reading


More in AFP

Copyright © 2016 by the American Academy of Family Physicians.

This content is owned by the AAFP. A person viewing it online may make one printout of the material and may use that printout only for his or her personal, non-commercial reference. This material may not otherwise be downloaded, copied, printed, stored, transmitted or reproduced in any medium, whether now known or later invented, except as authorized in writing by the AAFP.  See https://www.aafp.org/about/this-site/permissions.html for copyright questions and/or permission requests.