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Clin J Sport Med. 2010 Sep;20(5):368-71. doi: 10.1097/JSM.0b013e3181f207f2.

High prevalence of vitamin D insufficiency in athletes and dancers.

Author information

1
Department of Orthopedic Surgery, Hadassah-Hebrew University Medical Center, Jerusalem, Israel. naamacons@gmail.com

Abstract

OBJECTIVE:

Vitamin D insufficiency is prevalent in various populations worldwide but with scarce data on physically active individuals. Vitamin D is important to athletes, affecting bone mass, immunity, and physical performance. This study evaluated the prevalence of vitamin D insufficiency and deficiency among young athletes and dancers.

DESIGN:

Cross-sectional study.

SETTING:

: Sport medicine clinic.

PATIENTS:

Data on 98 athletes and dancers (age, 14.7 +/- 3.0 years; range, 10-30 years; 53% men), who had undergone screening medical evaluations, were extracted from medical records.

INDEPENDENT VARIABLE:

Serum 25(OH)D concentrations.

MAIN OUTCOME MEASURES:

Serum 25(OH)D concentrations, age, sex, sport discipline, month of blood test, and serum ferritin. Vitamin D insufficiency was defined as serum 25(OH)D concentration <30 ng/mL.

RESULTS:

Mean serum 25(OH)D concentration was 25.3 +/- 8.3 ng/mL. Seventy-three percent of participants were vitamin D insufficient. Prevalence of vitamin D insufficiency was higher among dancers (94%), basketball players (94%), and Tae Kwon Do fighters (67%) and among athletes from indoor versus outdoor sports (80% vs 48%; P = 0.002). 25(OH)D levels adjusted for age and sex correlated with serum ferritin and season.

CONCLUSIONS:

In this study, conducted among young athletes and dancers from various disciplines in a sunny country, a high prevalence of vitamin D insufficiency was identified. A higher rate of vitamin D insufficiency was found among participants who practice indoors, during the winter months, and in the presence of iron depletion. Given the importance of vitamin D to athletes for several reasons, we suggest that athletes and dancers be screened for vitamin D insufficiency and treated as needed.

PMID:
20818195
DOI:
10.1097/JSM.0b013e3181f207f2
[Indexed for MEDLINE]

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