Effects of Vitamin D Supplementation on Serum 25-Hydroxyvitamin D Concentrations and Physical Performance in Athletes: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Farrokhyar, Forough; Sivakumar, Gayathri; Savage, Katey; Koziarz, Alex; Jamshidi, Sahab; Ayeni, Olufemi R.; Peterson, Devin; Bhandari, Mohit

doi:10.1007/s40279-017-0749-4

Cited by 67 publications

(73 citation statements)

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“…Heaney and Holick 29 suggested that serum 25(OH)D levels need to be between 120-225 nmol.L -1 , though a recent meta-analysis suggested physical performance is not significantly improved. 30 The current study reported increases in serum 25(OH)D via vitamin D supplementation, the intervention group also demonstrated a limited increase in muscle strength and reduction in injury incidence. The data were from one vocational dance school in the UK and therefore further research needs to carried out in schools at different latitudes and diets, though research on Australian dance students found similar results 31 .…”

Section: Discussionmentioning

confidence: 50%

Effect of Vitamin D on Muscle Function and Injury in Elite Adolescent Dancers: A Randomized Double-Blind Study

Wyon

Wolman

Kolokythas

et al. 2019

International Journal of Sports Physiology and Performance

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Section: Discussionmentioning

confidence: 50%

Effect of Vitamin D on Muscle Function and Injury in Elite Adolescent Dancers: A Randomized Double-Blind Study

Wyon

Wolman

Kolokythas

et al. 2019

International Journal of Sports Physiology and Performance

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“…Moreover, some experts claimed that a daily intake of 10,000 IU would take months, or years to display symptoms of toxicity (46). Additionally, Farrokhyar et al (47), in a current review study, indicated that for athletes with low baseline values of 25(OH)D, supplementation between 3,000 and 5,000 IU seem to be sufficient for significantly increasing its level during winter months. Therefore, the daily vitamin D dose of 5,000 IU seems to be considered as acceptable for short-duration supplementation.…”

Section: Discussionmentioning

confidence: 74%

Iron, Hematological Parameters and Blood Plasma Lipid Profile in Vitamin D Supplemented and Non-Supplemented Young Soccer Players Subjected to High-Intensity Interval Training

Jastrzębska

Kaczmarczyk

Suárez

et al. 2017

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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Summary Vitamin D deficiency has been associated with increased risk for cardiovascular disease and anemia. Vitamin D-related changes in lipid profile have been studied extensively but the relationship between vitamin D and lipid metabolism is not completely understood. As both vitamin D and intermittent training may potentially affect iron and lipid metabolism, the aim of the study was to evaluate whether a daily supplementation of vitamin D can modulate the response of hematological and lipid parameters to high-intensity interval training (HIIT) in soccer players. Thirty-six young elite junior soccer players were included in the placebo-controlled, double-blind study. Participants were non-randomly allocated into either a supplemented group (SG, n520, HIIT and 5,000 IU of vitamin D daily) or placebo group (PG, n516, HIIT and sunflower oil). Hematological parameters were ascertained before and after the 8-wk training. The change score (post-and pre-training difference) was calculated for each individual and the mean change score (MCS) was compared between SG and PG using the t test and analysis of covariance. There were no differences between SG and PG at baseline. The red and white cell count, hemoglobin, hematocrit, MCHC, ferritin, and HDL-cholesterol changed significantly over the 8-wk HIIT. However, no significant differences in MCS were observed between SG and PG for any variable. A daily vitamin D supplement did not have any impact on alteration in hematological or lipid parameters in young soccer players in the course of high-intensity interval training. Key Words nutrition, athletic training, sport, interval training, intermittent exercise In recent years, vitamin D has been the subject of intensive research with the primary goal of identifying and understanding its roles beyond the bones, such as cancer, immunity, cardiovascular risk, erythropoiesis, muscle function and athletic performance, to name a few (1, 2). Several lines of evidence, observational studies in particular, suggest that vitamin D lowers the risk of cardiovascular disease (3, 4). Numerous mechanistic explanations for this effect are proposed, such as change in insulin resistance, inflammatory reactions, and parathyroid hormone (PTH), renin and blood pressure levels (5). In addition, owing to a well-known relationship between dyslipidemia and atherosclerotic disease as well as a high prevalence of both vitamin D deficiency and cardiovascular disease, vitamin D-dependent changes in lipid profile have recently been given much attention (6). However, the relationship between vitamin D and lipid metabolism is not completely understood (7-10). Moreover, found that genetically reduced plasma 25-hydroxyvitamin D (25(OH)D) is not associated with increased risk of ischemic heart disease. Moreover, the results of Scragg et al.'s (12) randomized controlled trial (RCT) study showed no evidence that monthly high-dose vitamin D supplementation (100,000 IU a month) prevented cardiovascular diseases.In cross-sectional observational studies, lower p-2...

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“…There are currently no guidelines in place for vitamin D supplementation in either professional or recreational athletes. However, the International Olympic Committee (IOC) and researchers within the area of vitamin D and sport (Larson‐Meyer ; Todd et al ; Farrokhyar et al ; Owens et al ) are in agreement that the regular monitoring of vitamin D status is imperative for the health and wellbeing of athletes. In addition, the IOC suggests that vitamin D should be supplemented (according to the US general population guidelines; 15–20 μg/day) dependent upon the athlete's skin type and level of UVB exposure (Maughan et al ), although there is no supplementation protocol provided for athletes.…”

Section: Vitamin D Supplementation Within Professional Athletesmentioning

confidence: 99%

Effects of vitamin D on health outcomes and sporting performance: Implications for elite and recreational athletes

et al. 2020

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The primary source of vitamin D is through synthesis in the skin, following exposure to sunlight containing ultraviolet B (UVB) radiation. Supply through skin exposure can be supplemented by the diet, but there are relatively few dietary sources, especially those which provide a large amount of vitamin D per serving. Research into the effects of vitamin D status in different population groups has become an increasingly popular topic. The current interest surrounding vitamin D research in sport remains focused on the potential ergogenic effects of vitamin D on physical performance. However, the relationship between vitamin D (dietary intake and status) and musculoskeletal health in university athlete cohorts residing at higher latitudes (>40°N) remains underinvestigated. Within this review, the possible physiological roles that vitamin D may play within sport performance for recreational and professional athletes, as well as military recruits, will be discussed. The focus will be on muscular strength, cardiovascular health and the incidence of illness, including upper respiratory tract infections. Specifically, the effect that vitamin D deficiency {defined as a plasma/serum 25‐hydroxyvitamin D [25(OH)D] concentration of <25 nmol/l} may have on musculoskeletal health, including the incidence of stress fractures, is discussed. The review also seeks to highlight avenues for future research within vitamin D and sport, in particular for populations residing at higher latitudes (>40°N) where wintertime vitamin D deficiency is prevalent. It is hoped that this review will help to raise the awareness of the importance of existing advice in the UK for the avoidance of vitamin D deficiency and international vitamin D guidelines (such as in the US) on the achievement of vitamin D sufficiency [serum 25(OH)D >50 nmol/l] for optimum health and performance in athletes, both professional and recreational.

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Effects of Vitamin D Supplementation on Serum 25-Hydroxyvitamin D Concentrations and Physical Performance in Athletes: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Cited by 67 publications

References 54 publications

Effect of Vitamin D on Muscle Function and Injury in Elite Adolescent Dancers: A Randomized Double-Blind Study

Effect of Vitamin D on Muscle Function and Injury in Elite Adolescent Dancers: A Randomized Double-Blind Study

Iron, Hematological Parameters and Blood Plasma Lipid Profile in Vitamin D Supplemented and Non-Supplemented Young Soccer Players Subjected to High-Intensity Interval Training

Effects of vitamin D on health outcomes and sporting performance: Implications for elite and recreational athletes

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