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

R. Andrew ShanelyHuman Performance Laboratory, Appalachian State University, Kannapolis, NC, USA;College of Health Sciences, Appalachian State University, Boone, NC, USACorrespondence[email protected]

David C. NiemanHuman Performance Laboratory, Appalachian State University, Kannapolis, NC, USA;College of Health Sciences, Appalachian State University, Boone, NC, USA

Amy M. KnabHuman Performance Laboratory, Appalachian State University, Kannapolis, NC, USA;College of Health Sciences, Appalachian State University, Boone, NC, USA

Nicholas D. GillittDole Nutrition Research Laboratory, Kannapolis, NC, USA

Mary Pat MeaneyHuman Performance Laboratory, Appalachian State University, Kannapolis, NC, USA;College of Health Sciences, Appalachian State University, Boone, NC, USA

Fuxia JinDole Nutrition Research Laboratory, Kannapolis, NC, USA

Wei ShaBioinformatics Services Division, University of North Carolina at Charlotte, Kannapolis, NC, USA

Lynn Cialdella-KamHuman Performance Laboratory, Appalachian State University, Kannapolis, NC, USA;College of Health Sciences, Appalachian State University, Boone, NC, USA

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Abstract

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.

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

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

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