Serum 25-Hydroxyvitamin D Levels and Stress Fractures in Military Personnel: A Systematic Review and Meta-analysis.

Background: Low serum 25-hydroxyvitamin D (25(OH)D) levels have been associated with stress fractures in various physically active populations such as the military.

Purpose: To examine the association between serum 25(OH)D levels and stress fractures in the military.

Study Design: Systematic review and meta-analysis.

Prevalence of vitamin D inadequacy in athletes: a systematic-review and meta-analysis.

Background: Vitamin D is essential for maintaining optimal bone health. The prevalence of vitamin D inadequacy in athletes is currently unclear.

Objective: The objective of this study is to determine the prevalence of vitamin D inadequacy in athletes.