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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

Could vitamin D status impact World Cup soccer athlete performance?

Those watching the World Cup this year have witnessed professional soccer players from all around the world compete against each other. Skills and training are major factors in determining which team will be named champions, and a new study has found that vitamin D may be a factor, as well.

Published in PLoS One, the study examined the effects of vitamin D on muscle strength, aerobic capacity, speed, and how off season affects vitamin D and performance in professional soccer players.

Research has consistently shown that vitamin D levels affect strength and performance in athletes.

The results of the current study were meant to add to the existing evidence, specifically among soccer athletes, and provide more insight for sport scientists, coaches, and players on how to improve performance.

Researchers out of Greece enrolled 67 male professional soccer players who were not supplementing with vitamin D.

They measured the soccer players’ vitamin D levels and exercise performance at the end of the competition season in May, and at the end of their off season in July.

In line with previous research, the study found a significant relationship between high vitamin D levels and increased exercise performance at both times. Vitamin D levels were also significantly higher during their off season compared to their competition season.

The researchers believe that the increased sun exposure during the summer off season contributes to increased vitamin D levels. Interestingly, they suggest that exercise-induced stress may play a role in vitamin D status as levels were higher during times of reduced training and exercise.

“Analysis of our results showed that vitamin D levels are associated with neuromuscular performance and aerobic capacity in professional soccer players,” the researchers concluded.


Koundourakis N., et al. Vitamin D and Exercise Performance in Professional Soccer Players. PLOS ONE, 2014.

4 Responses to Could vitamin D status impact World Cup soccer athlete performance?

  1. Rita and Misty says:

    There’s a great book available on vitamin D and muscle strength:

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  2. Magic says:

    No doubt in my mind……….Vitamin D3 combined with a host of other vitamins and nutritionals can do wonders……..VitaminD3 being the lead vitamin. So many times I hear great results from just D3. I send people to this site. Frustrating to me when they don’t get the whole picture. Just take D3 alone.


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  3. Rita and Misty says:

    Graphically speaking–D requires its cofactors to be best utilized by our bodies: boron (one of my favs), magnesium (everyone else’s fav), zinc and K2. I also recommend iodine and selenium.

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  4. Rita and Misty says:

    And that great book I recommend does provide excellent information on those very necessary cofactors.

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