The role of vitamin D in muscle strength among the elderly

96 ABSTRACT Vitamin D deficiency is a common condition among the elderly and it is associated with an increased risk of fractures. The condition is common among elderly at higher latitude locations and very common among the institutionalized. Currently there is also evidence that low levels of vitamin D are associated with multiple disorders such as cardiovascular diseases, inflammation, and infectious diseases, among other things. In addition, clinical studies on the elderly have shown that the low vitamin D levels correlate with reduced muscle strength in the lower limbs and poor physical performance. However, suitable levels for maintaining proper muscle function and strength have not yet been established. Objective: To verify recent evidence of the effects of vitamin D on muscle strength in the elderly. Method: A survey of studies published between 2010 and 2014 in Pubmed, Medline, and Scopus using the terms “cholecalciferol”, “muscle strength,” and “elderly.” Results: Seven studies were selected. The results suggest a positive influence of vitamin D on muscle strength in the elderly. Conclusion: This review showed that despite the action of vitamin D on the musculoskeletal system, there is still uncertainty; there tended to be a greater benefit with vitamin D supplementation at higher doses. However, additional studies are needed to define the best therapeutic profile.