RT Journal Article T1 Effects of combined resistance training and plyometrics on physical performance in young soccer players A1 Franco-Marquez, F. A1 Rodríguez Rosell, David A1 Gonzalez-Suarez, J. M. A1 Pareja Blanco, Fernando A1 Mora-Custodio, R. A1 Yanez-Garcia, J. M. A1 González Badillo, Juan José K1 Under-15 soccer players K1 Full squat K1 Sprint K1 Strength K1 Jump ability K1 Velocity-based resistance training AB This study aimed to determine the effects of combined resistance training and plyometrics on physical performance in under-15 soccer players. One team (n=20) followed a 6-week resistance training program combined with plyometrics plus a soccer training program (STG), whereas another team (n=18) followed only the soccer training (CG). Strength training consisted of full squats with low load (45-60% 1RM) and low-volume (2-3 sets and 4-8 repetitions per set) combined with jumps and sprints twice a week. Sprint time in 10 and 20 m (T10, T20, T10-20), CMJ height, estimated one-repetition maximum (1RMest), average velocity attained against all loads common to pre- and post-tests (AV) and velocity developed against different absolute loads (MPV20, 30, 40 and 50) in full squat were selected as testing variables to evaluate the effects of the training program. STG experienced greater gains (P<0.05) in T20, CMJ, 1RMest, AV and MPV20, 30, 40 and 50 than CG. In addition, STG showed likely greater effects in T10 and T10-20 compared to CG. These results indicate that only 6 weeks of resistance training combined with plyometrics in addition to soccer training produce greater gains in physical performance than typical soccer training alone in young soccer players. PB Thieme group YR 2015 FD 2015-11 LK https://hdl.handle.net/10433/22570 UL https://hdl.handle.net/10433/22570 LA en NO Franco-Márquez F, Rodríguez-Rosell D, González-Suárez JM, Pareja-Blanco F, Mora-Custodio R, Yañez-García JM, González-Badillo JJ. Effects of Combined Resistance Training and Plyometrics on Physical Performance in Young Soccer Players. Int J Sports Med. 2015 Nov;36(11):906-14. doi: 10.1055/s-0035-1548890. Epub 2015 Jul 16. PMID: 26180903. NO Departamento de Deporte e informática. Universidad Pablo de Olavide. NO Centro de Investigación en Rendimiento Físico y Deportivo DS RIO RD May 7, 2026