Effect of acute caffeine intake on maximal aerobic speed in university soccer players assessed by the 30-15 intermittent fitness test - García-Chaves, D. C.; Fernandez Zapata, J. P.; Oyaga Álvarez, T.; Ortiz Escobar, N.; Villegas Mazo, A.; Corredor-Serrano, L. F. (Sports, 2026)