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Calcium, vitamin D and bone

Military training exercises put unusual stress on the body, and 40 percent of male and 60 percent of female new recruits who suffer bone stress fractures can’t complete their training. Earlier studies suggested calcium and vitamin D might reduce fracture in female military during training, but no military training studies have measured calcium and bone status.

In this study, 243 men and women in basic combat training took 2,000 mg of calcium plus 1,000 IU of vitamin D per day, or a placebo. After nine weeks, compared to placebo, signs of calcium available for maintaining bone, and signs of bone formation were much higher in the calcium and vitamin D group.

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