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Influence of a preventive training program on lower limb kinematics and vertical jump height of male volleyball athletes.
MedLine Citation:
PMID:  23312730     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: To examine the influence of a preventative training program (PTP) on sagittal plane kinematics during different landing tasks and vertical jump height (VJH) in males.
DESIGN: Six weeks prospective exercise intervention.
PARTICIPANTS: Fifteen male volleyball athletes (13 ± 0.7 years, 1.70 ± 0.12 m, 60 ± 12 kg).
INTERVENTIONS: PTP consisting of plyometric, balance and core stability exercises three times per week for six weeks. Bilateral vertical jumps with double leg (DL) and single leg (SL) landings were performed to measure the effects of training.
MAIN OUTCOME MEASUREMENTS: Kinematics of the knee and hip before and after training and VJH attained during both tasks after training. The hypothesis was that the PTP would produce improvements in VJH, but would not generate great changes in biomechanical behavior.
RESULTS: The only change identified for the SL was the longest duration of landing, which represents the time spent from initial ground contact to maximum knee flexion, after training, while increased angular displacement of the knee was observed during DL. The training did not significantly alter the VJH in either the SL (difference: 2.7 cm) or the DL conditions (difference: 3.5 cm).
CONCLUSIONS: Despite the PTP's effectiveness in inducing some changes in kinematics, the changes were specific for each task, which highlights the importance of the specificity and individuality in selecting prevention injury exercises. Despite the absence of significant increases in the VJH, the absolute differences after training showed increases corroborating with the findings of statistically powerful studies that compared the results with control groups. The results suggest that short-term PTPs in low risk young male volleyball athletes may enhance performance and induce changes in some kinematic parameters.
Authors:
Gustavo Leporace; Jomilto Praxedes; Glauber Ribeiro Pereira; Sérgio Medeiros Pinto; Daniel Chagas; Leonardo Metsavaht; Flávio Chame; Luiz Alberto Batista
Publication Detail:
Type:  Journal Article     Date:  2012-06-19
Journal Detail:
Title:  Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine     Volume:  14     ISSN:  1873-1600     ISO Abbreviation:  Phys Ther Sport     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100940513     Medline TA:  Phys Ther Sport     Country:  England    
Other Details:
Languages:  eng     Pagination:  35-43     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Laboratory of Biomechanics and Motor Behavior, State University of Rio de Janeiro, Brazil; Institute Brazil of Health Technologies, Rio de Janeiro, Brazil; Biomedical Engineering Program, COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: guleporace@yahoo.com.br.
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