A study by the EHU-University of the Basque Country and the University of Urbino investigated the effects of vitamin D supplementation on runners and non-runners.
Vitamin D Supplementation: Key Findings
Led by researcher Eneko Fernández, the study involved participants taking daily vitamin D supplements for eight weeks during autumn and winter. A control group did not take supplements.
- Immune System: Blood analyses showed improved white blood cell counts in those who took supplements, indicating a more balanced immune system.
- Physical Performance: No direct effect was observed on maximum oxygen consumption, explosive leg power, or isometric strength.
- Vitamin D Levels: Runners who trained outdoors without supplements had vitamin D levels similar to non-runners who took supplements.
"Outdoor physical activity is an effective strategy to combat vitamin D deficiency," said Fernández, offering additional health benefits beyond supplementation.
Recommendations
Fernández advised spending more time outdoors in winter, even for 20-30 minutes of exercise, to maintain adequate vitamin D levels.