Outdoor distance runners had great Vitamin D levels (50 ng)
Female Distance Runners Training in Southeastern United States Have Adequate Vitamin D Status.
Int J Sport Nutr Exerc Metab. 2015 Dec 16. [Epub ahead of print]
Wentz LM1, Liu PY, Ilich JZ, Haymes EM.
Department of Nutrition Science, East Carolina University, Greenville, NC.
BACKGROUND:
High rates of vitamin D deficiency have been reported in athletes. The purpose of this study was to evaluate the associations between vitamin D and bone health, and parathyroid hormone (PTH) concentrations in female runners who trained at 30.4° degrees north .
METHODS:
Serum 25-hydroxyvitamin D (25(OH)D), PTH, body composition, and bone mineral density (BMD) were measured in 59 female runners, aged 18-40 years. Stress fracture history, training duration and frequency were evaluated by questionnaire. As per National Endocrine Society cut-offs, serum vitamin D ranges were: 25(OH)D < 50 nmol/L for deficient; 50-75 nmol/L for insufficient; and ≥ 75 nmol/L for sufficient status.
RESULTS:
Mean serum 25(OH)D concentrations were 122.6±63.9 nmol/L , with 18.6% of subjects in the deficient (5.1%) or insufficient (13.5%) range. No significant differences were observed between sufficient and deficient/insufficient subjects for BMD, PTH, history of stress fractures, or demographic data.
CONCLUSIONS:
The majority of distance runners maintained sufficient vitamin D status, suggesting that training outdoors in latitude where vitamin D synthesis occurs year-round reduces the risk for vitamin D deficiency. Data do not support the indiscriminate supplementation of outdoor athletes in southern latitudes without prior screening.
PMID: 26696653
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See also VitaminDWiki
Elite outdoor athletes had 52 ng of vitamin D – March 2013** Overview Sports and vitamin D has the following summary__
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