Predictive Factors for Vitamin D Concentrations in Swiss Athletes: A Cross-sectional Study Vitamin D concentrations that correspond to 75 Nmol / L 25 (OH) D were associated with the maintenance of muscle function, growth and regeneration, optimal bone health and immunology for athletes. In this study, the prevalence and predictors for insufficient 25 (OH) D concentrations were examined for athletes. 603schweizer athletes were evaluated.25 (OH) D was analyzed by high performance liquid chromatography (HPLC).A standardized questionnaire was used to collect information about possible predictors for the 25 (OH) D concentrations. 50 \ .5% showed inadequate 25 (OH) D concentrations.Differences in the predicted probability of inadequate 25 (OH) D were in vitamin D supplementation (42%) compared to non-supplementation (52%), for indoor athletes (58%) against outdoor sports (43%) and inThe sun-senior autumn season (49%), winter (70%) and spring (57%) compared to summer (17%). Higher BMI Z values and age were connected to higher 25 (OH) D concentrations. Inadequate 25 (OH) D concentrations are common for athletes, especially in a recent age, in those who have not been supplemented, for athletes trained in closed rooms, and during the sun-senior season.
Since the prevalence inadequate 25 (OH) D concentrations in this study was high, regular supplementation can be indexed for athletes, except maybe during the summer season. Further research is required to determine which 25 (OH) D concentrations lead to optimal health and performance in athletes. The whole study can be found under https://www.thieme-connect.com/products/ejournals/abstract/10.1055/a-0669-0791