Aerobic exercise and vascular cognitive impairment: A randomized controlled trial.

Authors:
Teresa Liu-Ambrose
Teresa Liu-Ambrose
University of British Columbia
Canada
John R Best
John R Best
University of Georgia
United States
Jennifer C Davis
Jennifer C Davis
University of British Columbia
Canada
Philip E Lee
Philip E Lee
University of British Columbia
Claudia Jacova
Claudia Jacova
University of British Columbia
Canada
Lara A Boyd
Lara A Boyd
University of British Columbia
Penelope M Brasher
Penelope M Brasher
University of British Columbia
Canada

Neurology 2016 Nov 19;87(20):2082-2090. Epub 2016 Oct 19.

Author affiliations are provided at the end of the article.

Objective: To assess the efficacy of a progressive aerobic exercise training program on cognitive and everyday function among adults with mild subcortical ischemic vascular cognitive impairment (SIVCI).

Methods: This was a proof-of-concept single-blind randomized controlled trial comparing a 6-month, thrice-weekly, progressive aerobic exercise training program (AT) with usual care plus education on cognitive and everyday function with a follow-up assessment 6 months after the formal cessation of aerobic exercise training. Primary outcomes assessed were general cognitive function (Alzheimer's Disease Assessment Scale-Cognitive subscale [ADAS-Cog]), executive functions (Executive Interview [EXIT-25]), and activities of daily living (Alzheimer's Disease Cooperative Study-Activities of Daily Living [ADCS-ADL]).

Results: Seventy adults randomized to aerobic exercise training or usual care were included in intention-to-treat analyses (mean age 74 years, 51% female, n = 35 per group). At the end of the intervention, the aerobic exercise training group had significantly improved ADAS-Cog performance compared with the usual care plus education group (-1.71 point difference, 95% confidence interval [CI] -3.15 to -0.26, p = 0.02); however, this difference was not significant at the 6-month follow-up (-0.63 point difference, 95% CI -2.34 to 1.07, p = 0.46). There were no significant between-group differences at intervention completion and at the 6-month follow-up in EXIT-25 or ADCS-ADL performance. Examination of secondary measures showed between-group differences at intervention completion favoring the AT group in 6-minute walk distance (30.35 meter difference, 95% CI 5.82 to 54.86, p = 0.02) and in diastolic blood pressure (-6.89 mm Hg difference, 95% CI -12.52 to -1.26, p = 0.02).

Conclusions: This study provides preliminary evidence for the efficacy of 6 months of thrice-weekly progressive aerobic training in community-dwelling adults with mild SIVCI, relative to usual care plus education.

Clinicaltrialsgov Identifier: NCT01027858.

Classification Of Evidence: This study provides Class II evidence that for adults with mild SIVCI, an aerobic exercise program for 6 months results in a small, significant improvement in ADAS-Cog performance.

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Source
http://www.neurology.org/content/early/2016/10/19/WNL.000000
Web Search
http://dx.doi.org/10.1212/WNL.0000000000003332DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5109938PMC

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November 2016
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