Comparative effects of caffeine, beta-alanine, and their combination on mechanical, physiological, and perceptual responses to upper-body superset resistance training - Antonio Martos-Arregui; Zhaoqian Li; Sergio Miras-Moreno; Daniel Marcos-Frutos; Pablo Jiménez-Martínez; Carlos Alix-Fages; Danica Janicijevic; Amador García-Ramos (European Journal of Applied Physiology, 2025)