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NCAA athletes with low vitamin D do far fewer squats, etc. – April 2016

Compromised Vitamin D Status Negatively Affects Muscular Strength and Power of Collegiate Athletes.

Int J Sport Nutr Exerc Metab. 2016 Apr 20. [Epub ahead of print]
Hildebrand RA1, Miller B, Warren A, Hildebrand D, Smith BJ.
1College of Health Sciences, The University of Tulsa, Tulsa, OK.

Increasing evidence indicates that compromised vitamin D status, as indicated by serum 25-hydroxyvitamin D (25-OH D), is associated with decreased muscle function. The purpose of this study was to determine the vitamin D status of collegiate athletes residing in the southern U.S. and its effects on muscular strength and anaerobic power. Collegiate athletes (n=103) from three separate NCAA athletic programs were recruited for the study. Anthropometrics, vitamin D and calcium intake, and sun exposure data were collected along with serum 25-OH D and physical performance measures (Vertical Jump Test, Shuttle Run Test, Triple Hop for Distance Test and the 1 Repetition Maximum Squat Test) to determine the influence of vitamin D status on muscular strength and anaerobic power. Approximately

  • 68% of the study participants were vitamin D adequate (>75 nmol/L), whereas
  • 23% were insufficient (75-50 nmol/L) and
  • 9%, predominantly non-Caucasian athletes, were deficient (<50 nmol/L).

Athletes who had lower vitamin D status had reduced performance scores (P<0.01) with odds ratios of

  • 0.85 on the Vertical Jump Test,
  • 0.82 on the Shuttle Run Test,
  • 0.28 on the Triple Hop for Distance Test, and
  • 0.23 on the 1 RM Squat Test.

These findings demonstrate that even NCAA athletes living in the southern US are at risk for vitamin D insufficiency and deficiency and that maintaining adequate vitamin D status may be important for these athletes to optimize their muscular strength and power.

PMID: 27097322

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See also VitaminDWiki

Overview Sports and vitamin D has the following summary

Athletes are helped by vitamin D by:

  1. Faster reaction time
  2. Far fewer colds/flus during the winter
  3. Less sore/tired after a workout
  4. Fewer micro-cracks and broken bones
  5. Bones which do break heal much more quickly
  6. Increased VO2 and exercise endurance Feb 2011
  7. Indoor athletes especially need vitamin D
  8. Professional indoor athletes are starting to supplement with vitamin D or use vitamin D beds
  9. Olympic athletes have used UV/vitamin D since the 1930's
  10. The biggest gain from the use of vitamin D is by those who exercise less than 2 hours per day.
  11. Reduced muscle fatigue with 10,000 IU vitamin D daily
  12. Muscle strength improved when vitamin D added: 3 Meta-analysis


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