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Background: Vitamin D concentrations corresponding to 75 nmol/L of 25(OH)D or more have been related to maintained muscle function, growth and regeneration, to optimal bone health and immunology in athletes. The objective of this study was to investigate prevalence and predictors of insufficient 25(OH)D concentrations in athletes and to come up with recommendations for our Swiss athletes. Methods: 603 competitive Swiss athletes were assessed during their annual pre-participation examination. A standardized questionnaire was used to gather information about potential predictors for 25(OH)D concentrations.
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The Athlete Biological Passport detects the effect of doping on the organism through longitudinal monitoring of biomarkers. The first quantitative analysis is performed by a software algorithm based on the Bayes theorem, taking into account previous values of the athlete. Profiles which have been found as abnormal with this technique are submitted for qualitative analysis to an expert panel regarding potential causes for the abnormality. Possible causes include analytical shortcomings, Pathologies, extremes of physiological regulation or doping.
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