Influence of Vitamin D Supplementation by Sunlight or Oral D3 on Exercise Performance

摘要

Purpose To determine the relationship between vitamin D status and exercise performance in a large, prospective cohort study of young men and women across seasons (study 1). Then, in a randomized, placebo-controlled trial, to investigate the effects on exercise performance of achieving vitamin D sufficiency (serum 25(OH)D 50 nmol L -1) by a unique comparison of safe, simulated-sunlight and oral vitamin D-3 supplementation in wintertime (study 2).