Lozano Berges, Gabriel Pantoja, Pablo Moradell-Fernández, Ana Matute-Llorente, Ángel Gómez-Bruton, Alejandro Does caffeine supplementation improve physical performance of elite ice hockey players?: A randomized, double-blind, placebo-controlled, counterbalanced, cross-over trial Sci. sports 10.1016/j.scispo.2023.03.008 2023 2023