Circulating growth hormone, cortisol and testosterone in relation to vitamin D status: influence of lower and upper body wingate anaerobic test in elite artistic gymnasts - Mieszkowski, J.; Brzezinska, P.; Kochanowicz, M.; Niespodzinski, B.; Grad, R.; Sawicki, P.; Antosiewicz, J.; Kochanowicz, A. (BMC Sports Science, Medicine and Rehabilitation, 2025)