Rodrigo Ramírez-Campillo1, José Antonio González-Jurado2, Cristian Martínez3, Fábio Yuzo Nakamura4, Luis Peñailillo5, Cesar M P Meylan6, Alexis Caniuqueo7, Rodrigo Cañas-Jamet8, Jason Moran9, Alicia M Alonso-Martínez10, Mikel Izquierdo11. 1. Department of Physical Activity Sciences, Universidad de Los Lagos, Chile; Laboratory of Exercise Sciences, MEDS Clinic, Chile. Electronic address: r.ramirez@ulagos.cl. 2. Faculty of Sport, University Pablo de Olavide, Spain. Electronic address: jagonjur@upo.es. 3. Department of Physical Education, Sport and Recreation, Universidad de La Frontera, Chile. Electronic address: cristian.martinez.s@ufrontera.cl. 4. Departamento de Educação Física, Universidade Estadual de Londrina, Brazil. Electronic address: fabioy_nakamura@yahoo.com.br. 5. Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis Terrae, Chile. Electronic address: lpenailillo@uft.cl. 6. Canadian Sport Institute Pacific, Canada; Canadian Soccer Association, Canada. Electronic address: cmeylan@csipacific.ca. 7. Laboratory of Physiology and Biomechanics, Universidad Autónoma de Chile, Chile. Electronic address: alexis.caniuqueo@uautonoma.cl. 8. Laboratorio de Fisiología, Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Chile; Escuela de Kinesiología, Facultad de Medicina, Universidad Diego Portales, Chile. Electronic address: rcanaskine@gmail.com. 9. Centre for Sports and Exercise Science, School of Biological Sciences, University of Essex, United Kingdom. Electronic address: jmorana@essex.ac.uk. 10. Department of Health Sciences, Public University of Navarre, Spain. 11. Department of Health Sciences, Public University of Navarre, Spain. Electronic address: mikel.izquierdo@gmail.com.
Abstract
OBJECTIVES: To investigate the effects of a six-week plyometric training and creatine supplementation intervention on maximal-intensity and endurance performance in female soccer players during in-season training. DESIGN: Randomized, double-blind, placebo-controlled trial. METHODS:Young (age 22.9±2.5y) female players with similar training load and competitive background were assigned to a plyometric training group receiving placebo (PLACEBO, n=10), a plyometric training group receiving creatine supplementation (CREATINE, n=10) or a control group receiving placebo without following a plyometric program (CONTROL, n=10). Athletes were evaluated for jumping, maximal and repeated sprinting, endurance and change-of-direction speed performance before and after six weeks of training. RESULTS: After intervention the CONTROL group did not change, whereas both plyometric training groups improved jumps (ES=0.25-0.49), sprint (ES=0.35-0.41), repeated sprinting (ES=0.48-0.55), endurance (ES=0.32-0.34) and change-of-direction speed performance (ES=0.46-0.55). However, the CREATINE group improved more in the jumps and repeated sprinting performance tests than the CONTROL and the PLACEBO groups. CONCLUSIONS: Adaptations to plyometric training may be enhanced with creatine supplementation.
RCT Entities:
OBJECTIVES: To investigate the effects of a six-week plyometric training and creatine supplementation intervention on maximal-intensity and endurance performance in female soccer players during in-season training. DESIGN: Randomized, double-blind, placebo-controlled trial. METHODS: Young (age 22.9±2.5y) female players with similar training load and competitive background were assigned to a plyometric training group receiving placebo (PLACEBO, n=10), a plyometric training group receiving creatine supplementation (CREATINE, n=10) or a control group receiving placebo without following a plyometric program (CONTROL, n=10). Athletes were evaluated for jumping, maximal and repeated sprinting, endurance and change-of-direction speed performance before and after six weeks of training. RESULTS: After intervention the CONTROL group did not change, whereas both plyometric training groups improved jumps (ES=0.25-0.49), sprint (ES=0.35-0.41), repeated sprinting (ES=0.48-0.55), endurance (ES=0.32-0.34) and change-of-direction speed performance (ES=0.46-0.55). However, the CREATINE group improved more in the jumps and repeated sprinting performance tests than the CONTROL and the PLACEBO groups. CONCLUSIONS: Adaptations to plyometric training may be enhanced with creatine supplementation.
Authors: Rodrigo Ramirez-Campillo; Cristian Álvarez; Antonio García-Hermoso; Robinson Ramírez-Vélez; Paulo Gentil; Abbas Asadi; Helmi Chaabene; Jason Moran; Cesar Meylan; Antonio García-de-Alcaraz; Javier Sanchez-Sanchez; Fabio Y Nakamura; Urs Granacher; William Kraemer; Mikel Izquierdo Journal: Sports Med Date: 2018-05 Impact factor: 11.136
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