Vitamin D and Weight Cycling: Impact on Injury, Illness, and Inflammation in Collegiate Wrestlers.

Unlabelled: This study explored the link between vitamin D status and frequency of skin infections, inflammation, and injury in college wrestlers during an academic year.

Methods: Serum 25-hydroxyvitamin D (25(OH)D) ( = 19), plasma cytokine (TNF-α, IL-6, IL-10) ( = 18) concentrations, and body weight/composition were measured and injury/illness/skin infection data were collected in fall, winter, and spring.

Results: In the fall, 74% of wrestlers had vitamin D concentrations <32 ng/mL which increased to 94% in winter and spring.