Vitamin D levels linked to cardiorespiratory fitness

Amr Marawan, M.D., from the Virginia Commonwealth University School of Medicine in Richmond, and colleagues used data from the National Health and Nutrition Examination Survey (2001-2004) to assess the association between vitamin D levels and CRF. Their analysis included 1,995 participants aged 20 to 49 years. They excluded individuals with vitamin D levels at the 5 percent extremes of the distribution and used maximal oxygen consumption (VO2 max) as a surrogate for CRF.

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