Influence of vitamin D mushroom powder supplementation on exercise-induced muscle damage in vitamin D insufficient high school athletes.

TitleInfluence of vitamin D mushroom powder supplementation on exercise-induced muscle damage in vitamin D insufficient high school athletes.
Publication TypeJournal Article
Year of Publication2014
AuthorsR Shanely A, Nieman DC, Knab AM, Gillitt ND, Meaney MPat, Jin F, Sha W, Cialdella-Kam L
JournalJ Sports Sci
Volume32
Issue7
Pagination670-9
Date Published2014
ISSN1466-447X
Keywords25-Hydroxyvitamin D 2, Adolescent, Agaricus, Athletes, Biological Products, Calcifediol, Dietary Supplements, Exercise, Humans, Male, Muscle, Skeletal, Muscular Diseases, Schools, Sports, Vitamin D, Vitamin D Deficiency, Vitamins
Abstract

<p>Incidence of vitamin D deficiency is increasing worldwide. The purpose of this study was to determine if supplementation with vitamin D2 from Portobello mushroom powder would enhance skeletal muscle function and attenuate exercise-induced muscle damage in low vitamin D status high school athletes. Participants were randomised to Portobello mushroom powder (600 IU/d vitamin D2) or placebo for 6 weeks. Participants then completed a 1.5-h exercise session designed to induce skeletal muscle damage. Blood samples and measures of skeletal muscle function were taken pre-supplementation, post-supplementation/pre-exercise and post-exercise. Six weeks supplementation with vitamin D2 increased serum 25(OH)D2 by 9.9-fold and decreased serum 25(OH)D3 by 28%. Changes in skeletal muscle function and circulating markers of skeletal muscle damage did not differ between groups. In conclusion, 600 IU/d vitamin D2 increased 25(OH)D2 with a concomitant decrease in 25(OD)D3, with no effect on muscular function or exercise-induced muscle damage in high school athletes.</p>

DOI10.1080/02640414.2013.847279
Alternate JournalJ Sports Sci
PubMed ID24117183