Exercise: A Possibly Effective Way to Improve Vitamin D Nutritional Status

Area of Science:

• Exercise physiology
• Nutritional biochemistry
• Public health

Background:

• Vitamin D deficiency is a global health concern with serious implications.
• Vitamin D status is primarily linked to sunlight exposure and intake, but exercise's role is under investigation.
• Existing research on exercise and vitamin D (25(OH)D) levels yields conflicting results.

Purpose of the Study:

• To review the impact of exercise on circulating vitamin D metabolites.
• To explore the potential mechanisms through which exercise influences vitamin D levels.
• To clarify the relationship between different exercise types and vitamin D status.

Main Methods:

• Review of existing scientific literature on exercise and vitamin D.
• Analysis of studies examining the effects of endurance and resistance training on vitamin D metabolites.
• Investigation into potential sex-specific effects and influencing factors.

Main Results:

• Endurance exercise significantly elevates serum 25(OH)D in vitamin D-deficient individuals, but not in sufficient ones.
• Resistance training does not show a significant effect on serum 25(OH)D levels.
• Chronic endurance exercise training can increase serum 1,25(OH)2D, potentially influenced by sex.

Conclusions:

• Exercise, particularly endurance training, can modulate vitamin D metabolite levels.
• Mechanisms may involve regulation of tissue storage or utilization of vitamin D metabolites.
• Factors like vitamin D status, exercise type/intensity, and sex are crucial determinants.