Reliability of Dynamic Shoulder Strength Test Battery Using Multi-Joint Isokinetic Device García Buendía, Gustavo Rodríguez Perea, Ángela Chirosa Ríos, Ignacio Jesús Chirosa Ríos, Luis Javier Martínez García, Dario shoulder strength isokinetic; athletic performance This study aimed to determine the absolute and relative reliability of concentric and eccentric flexion, extension, horizontal abduction, and adduction movements of the shoulder using a functional electromechanical dynamometer (FEMD). Forty-three active male university students (23.51 ± 4.72 years) were examined for concentric and eccentric strength of shoulder flexion, extension, horizontal abduction, and horizontal adduction with an isokinetic test at 0.80 m·s−1. Relative reliability was determined by intraclass correlation coefficients (ICCs) with 95% confidence intervals. Absolute reliability was quantified by the standard error of measurement (SEM) and coefficient of variation (CV). Reliability was very high to extremely high for all movements on concentric and eccentric strength measurements (ICC: 0.76–0.94, SEM: 0.63–6.57%, CV: 9.40–19.63%). The results of this study provide compelling evidence for the absolute and relative reliability of concentric and eccentric flexion, extension, horizontal abduction, and horizontal adduction shoulder isokinetic strength tests in asymptomatic adults. The mean concentric force was the most reliable strength value for all tests. 2024-07-24T10:36:56Z 2024-07-24T10:36:56Z 2024-06-01 journal article García Buendía, G. et. al. Sensors 2024, 24, 3568. [https://doi.org/10.3390/s24113568] https://hdl.handle.net/10481/93448 10.3390/s24113568 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI