alexa Effect of vitamin D supplementation on muscle strength, gait and balance in older adults: a systematic review and meta-analysis.
Neurology

Neurology

Journal of Alzheimers Disease & Parkinsonism

Author(s): Muir SW, MonteroOdasso M

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Abstract OBJECTIVES: To systematically review and quantitatively synthesize the effect of vitamin D supplementation on muscle strength, gait, and balance in older adults. DESIGN: Systematic review and meta-analysis. SETTING: MEDLINE, EMBASE, Cochrane Library, bibliographies of selected articles, and previous systematic reviews were searched between January 1980 and November 2010 for eligible articles. PARTICIPANTS: Older adults (≥60) participating in randomized controlled trials of the effect of supplemental vitamin D without an exercise intervention on muscle strength, gait, and balance. MEASUREMENTS: Data were independently extracted, and study quality was evaluated. Meta-analysis using a fixed-effects model was performed and the I(2) statistic was used to assess heterogeneity. RESULTS: Of 714 potentially relevant articles, 13 met the inclusion criteria. In the pooled analysis, vitamin D supplementation yielded a standardized mean difference of -0.20 (95\% confidence interval (CI) = -0.39 to -0.01, P = .04, I(2) = 0\%) for reduced postural sway, -0.19 (95\% CI = -0.35 to -0.02, P = .03, I(2) = 0\%) for decreased time to complete the Timed Up and Go Test, and 0.05 (95\% CI = -0.11 to 0.20, P = .04, I(2) = 0\%) for lower extremity strength gain. Regarding dosing frequency regimen, only one study demonstrated a beneficial effect on balance with a single large dose. All studies with daily doses of 800 IU or more demonstrated beneficial effects on balance and muscle strength. CONCLUSION: Supplemental vitamin D with daily doses of 800 to 1,000 IU consistently demonstrated beneficial effects on strength and balance. An effect on gait was not demonstrated, although further evaluation is recommended. © 2011, Copyright the Authors Journal compilation © 2011, The American Geriatrics Society. This article was published in J Am Geriatr Soc and referenced in Journal of Alzheimers Disease & Parkinsonism

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