Shoulder functional ratio in elite junior tennis players

Shoulder functional ratio in elite junior tennis players

Author Saccol, Michele Forgiarini Google Scholar
Gracitelli, Guilherme Conforto Google Scholar
Silva, Rogerio Teixeira da Google Scholar
Souza Laurino, Cristiano Frota de Google Scholar
Fleury, Anna Maria Autor UNIFESP Google Scholar
Andrade, Marilia dos Santos Autor UNIFESP Google Scholar
Silva, Antonio Carlos da Autor UNIFESP Google Scholar
Institution NEO Orthoped Sports Med Res Ctr
Universidade Federal de São Paulo (UNIFESP)
Abstract Objective: To evaluate Shoulder rotation strength and compare the functional ratio between Shoulders of elite junior tennis players.Design: This cross-sectional Study evaluated Muscular rotation performance of 40 junior tennis players (26 male and 14 female) with an isokinetic dynamometer.Main outcome measures: Strength variables of external (ER) and internal rotators (IR) in concentric and eccentric modes were considered. for the peak torque functional ratio, the eccentric strength of the ER and the concentric strength of the IR were calculated.Results: All variables related to IR were significantly higher on the dominant compared to the non-dominant side in males and females (p < 0.05), but only boys exhibited this dominance effect in ER (p < 0.05 and p < 0.001). Regarding functional ratios, they were significantly lower for the dominant shoulder (p < 0.001) and below 1.00 for both groups, indicating that the eccentric strength of the ER was not greater than the concentric strength of the IR.Conclusion: Elite junior tennis players without shoulder injury have Shoulder rotation muscle strength imbalances that alter the normal functional ratio between rotator cuff muscles, Although these differences do nor seem to affect the athletic performance, detection and prevention with exercise programs at an early age are recommended. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
Keywords Tennis
Shoulder
Torque
Muscle strength
Language English
Date 2010-02-01
Published in Physical Therapy in Sport. Edinburgh: Churchill Livingstone, v. 11, n. 1, p. 8-11, 2010.
ISSN 1466-853X (Sherpa/Romeo, impact factor)
Publisher Churchill Livingstone
Extent 8-11
Origin http://dx.doi.org/10.1016/j.ptsp.2009.11.002
Access rights Closed access
Type Article
Web of Science ID WOS:000275226300003
URI http://repositorio.unifesp.br/handle/11600/32231

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