title: Effects of plyometric training and creatine supplementation on maximal-intensity exercise and endurance in female soccer players.
abstract: OBJECTIVE
  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.
  
  
  METHODS
  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.affiliation: Department of Physical Activity Sciences, Universidad de Los Lagos, Chile; Laboratory of Exercise Sciences, MEDS Clinic, Chile. Electronic address: r.ramirez@ulagos.cl.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Ramírez-Campillo
authors.affiliation: Faculty of Sport, University Pablo de Olavide, Spain. Electronic address: jagonjur@upo.es.
authors.forename: José Antonio
authors.initials: JA
authors.lastname: González-Jurado
authors.affiliation: Department of Physical Education, Sport and Recreation, Universidad de La Frontera, Chile. Electronic address: cristian.martinez.s@ufrontera.cl.
authors.forename: Cristian
authors.initials: C
authors.lastname: Martínez
authors.affiliation: Departamento de Educação Física, Universidade Estadual de Londrina, Brazil. Electronic address: fabioy_nakamura@yahoo.com.br.
authors.forename: Fábio Yuzo
authors.initials: FY
authors.lastname: Nakamura
authors.affiliation: Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis Terrae, Chile. Electronic address: lpenailillo@uft.cl.
authors.forename: Luis
authors.initials: L
authors.lastname: Peñailillo
authors.affiliation: Canadian Sport Institute Pacific, Canada; Canadian Soccer Association, Canada. Electronic address: cmeylan@csipacific.ca.
authors.forename: Cesar M P
authors.initials: CM
authors.lastname: Meylan
authors.affiliation: Laboratory of Physiology and Biomechanics, Universidad Autónoma de Chile, Chile. Electronic address: alexis.caniuqueo@uautonoma.cl.
authors.forename: Alexis
authors.initials: A
authors.lastname: Caniuqueo
authors.affiliation: 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.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Cañas-Jamet
authors.affiliation: Centre for Sports and Exercise Science, School of Biological Sciences, University of Essex, United Kingdom. Electronic address: jmorana@essex.ac.uk.
authors.forename: Jason
authors.initials: J
authors.lastname: Moran
authors.affiliation: Department of Health Sciences, Public University of Navarre, Spain.
authors.forename: Alicia M
authors.initials: AM
authors.lastname: Alonso-Martínez
authors.affiliation: Department of Health Sciences, Public University of Navarre, Spain. Electronic address: mikel.izquierdo@gmail.com.
authors.forename: Mikel
authors.initials: M
authors.lastname: Izquierdo
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D003401:Creatine / Q000627:therapeutic use*; D019587:Dietary Supplements; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D010807:Physical Endurance / Q000502:physiology*; D059385:Plyometric Exercise / Q000379:methods*; D012916:Soccer / Q000502:physiology*; D055815:Young Adult
chemical_list: D003401:Creatine
keywords: Ergogenic aids; Muscle strength; Sports; Strength training; Women