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Vitamin D improved muscle strength in ballet dancers

Athletes that train indoors during the winter months tend to have low levels of vitamin D due to lack of sunlight. Prior studies have linked low vitamin D levels to impaired performance and increased injury. In this study, 24 elite classical ballet dancers took 2,000 IU of vitamin D3 per day, or a placebo, during the winter. Doctors tested isometric muscle strength and vertical jump heights, and measured the rate of injury during the trial.

After four months, compared to placebo, ballet dancers who had taken vitamin D had 18.7 percent greater isometric muscle strength and could jump 7.1 percent higher in vertical jumps. Also, dance-stress injuries in the vitamin D group were far fewer and milder than in those who did not take vitamin D.

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