Vitamin D is an essential nutrient for maintaining bone health. Recent data suggest that vitamin D and calcium supplementation might affect stress fracture incidence in military personnel.
Although stress fracture is a health risk for military personnel during training, no study has investigated changes in vitamin D status in Soldiers during United States (US) Army basic combat training (BCT). This longitudinal study aimed to determine the effects of BCT on 25-hydroxyvitamin D (25(OH)D) and parathyroid hormone (PTH) levels in female Soldiers.
Serum 25(OH)D and PTH were assessed in 74 fasted Soldier volunteers before and after an 8-week BCT course conducted between August and October in Columbia, South Carolina. In the total study population, 25(OH)D levels decreased (mean +/- SD) from 72.9 +/- 30.0 to 63.3 +/- 19.8 nmol/L (P
Ethnicity affected changes in vitamin D status (ethnicity-by-time interaction, P
These data indicate that vitamin D status in female Soldiers may decline during military training in the late summer and early autumn months in the Southeastern US. Future studies should strive to determine impact of military clothing and seasonality on vitamin D status, as well as the functional impact of declining vitamin D status on bone health.
Author: Nancy AndersenJ KarlSonya CableKelly WilliamsJennifer RoodAndrew YoungHarris LiebermanJames McClungCredits/Source: Journal of the International Society of Sports Nutrition 2010, 7:38
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