Effects of Vitamin D Supplementation on Muscle Strength in Athletes: A Systematic Review

Abstract

Chiang, C-m, Ismaeel, A, Griffis, RB, and Weems, S. Effects of vitamin D supplementation on muscle strength in athletes: A systematic review. J Strength Cond Res 31(2): 566-574, 2017-The purpose of this systematic review of the literature was to investigate the effects of vitamin D supplementation on muscle strength in athletes. A computerized literature search of 3 databases (PubMed, MEDLINE, and Scopus) was performed. Included in the review were randomized controlled trials (RCTs), published in English, which measured serum vitamin D concentrations and muscle strength in healthy, athletic participants aged 18-45 years. Quality was assessed using the PEDro scale. Five RCTs and 1 controlled trial were identified, and quality assessment showed 5 trials were of "excellent quality" and 1 was of "good quality." Trials lasted from 4 weeks to 6 months and dosages ranged from 600 to 5,000 International Units (IU) per day. Vitamin D2 was found to be ineffective at impacting muscle strength in both studies wherein it was administered. In contrast, vitamin D3 was shown to have a positive impact on muscle strength. In 2 studies, strength outcome measures were significantly improved after supplementation (p ≤ 0.05). In the other 2 studies administering vitamin D3, there were trends for improved muscle strength. Specifically, improvements in strength ranged from 1.37 to 18.75%. Additional studies are needed to confirm these associations.

Do multi-ingredient protein supplements augment resistance training-induced gains in skeletal muscle mass and strength? A systematic review and meta-analysis of 35 trials

“…11 Vit D activates the extracellular signal-regulated kinase pathway to stimulate muscle cell proliferation and growth to impact muscle function. 12 How PUFA augments muscle mass is not fully understood, but increased rates of muscle protein synthesis (MPS) 13 and small changes within the muscle transcriptome are reported in humans. 14 If (regular) protein supplementation is an effective strategy primarily limited to young, trained individuals, 9 MIP supplementation may be a way to increase muscle mass and strength in a larger population.…”

El rol de la vitamina D en la prevención de caídas en sujetos con sarcopenia

“…La sarcopenia tiene una prevalencia estimada entre 5-13% en personas entre 60-70 años y de 11-50% en personas mayores de 80 años, por lo que esta afecta mayormente a personas mayores o de la tercera edad 9 . En cuanto a su tratamiento se ha estimado que la vitamina D afecta la fuerza y función muscular, además de la regulación de la expresión del 5% del genoma completo del cuerpo humano por lo que una hipovitaminosis D puede conducir al desarrollo de la sarcopenia y otras patologías 10 .…”

Vitamin D and calcium supplementation, skeletal muscle strength and serum testosterone in young healthy adult males: Randomized control trial

“…Vitamin D deficiency has been reported among indoor athletes and Asian Indian students . They are often advised vitamin D and calcium supplementation to help enhance muscle strength.…”

“…Vitamin D deficiency has been reported among indoor athletes and Asian Indian students. [6][7][8][9][10] They are often advised vitamin D and calcium supplementation to help enhance muscle strength. Unlike elderly, there is paucity of studies on the effect of vitamin D and calcium on skeletal muscle strength in young adults.…”