Vitamin D level is known to be a factor potentially influencing physical fitness. but few studies have examined this phenomenon among youth athletes. We aimed to evaluate the associations of vitamin D levels (as measured by 25-hydroxyvitamin D concentrations—25(OH)D) with various physical fitness and motor performance tests in youth football (soccer) players. This cross-sectional stud... https://ashleyshomestores.shop/product-category/trunk/