Shoulder strength profile in elite junior tennis players: horizontal adduction and abduction isokinetic evaluation

Shoulder strength profile in elite junior tennis players: horizontal adduction and abduction isokinetic evaluation

Author Silva, R. T. Autor UNIFESP Google Scholar
Gracitelli, G. C. Autor UNIFESP Google Scholar
Saccol, M. F. Google Scholar
Laurino, CFD Google Scholar
Silva, A. C. Google Scholar
Braga Silva, Jefferson Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Objective: To establish normative data for muscle performance during isokinetic horizontal abduction and adduction of the shoulder in elite junior tennis players.Methods: Thirty six tennis players were evaluated ( 23 male, 13 female; mean age 14 years ( range 12 18)). An isokinetic dynamometer was used to test the shoulder horizontal abductors and adductors at 60 and 180 degrees/ s. Absolute and relative peak torque ( PT and PT/BW), total work (TW), endurance ratio ( ER), and the ratio of the peak torque between horizontal abductors and adductors (HAB/HAD ratio) were recorded. Data were compared for the dominant and non-dominant shoulders, horizontal abductor and adductor muscles, and between players grouped according to age.Results: the dominant shoulder was significantly ( p<0.05) stronger than the non-dominant shoulder in all variables except ER and HAB/HAD ratio. the abductors were significantly ( p< 0.05) weaker than the adductors in all subjects. the type of backhand ( one handed or two handed) did not influence the strength of the shoulder horizontal abductors on the dominant side. the number of years of tennis practice had an effect on muscle strength as evaluated by absolute data ( PT and TW) but not relative measurements (PT/ BW and TW/BW).Conclusion: the findings confirm that horizontal abduction and adduction are stronger in the dominant shoulder of junior tennis players. the clinical relevance of these findings is not established, and more studies are needed to compare tennis players with athletes from other sports and non-athletes.
Language English
Date 2006-06-01
Published in British Journal of Sports Medicine. London: B M J Publishing Group, v. 40, n. 6, p. 513-517, 2006.
ISSN 0306-3674 (Sherpa/Romeo, impact factor)
Publisher B M J Publishing Group
Extent 513-517
Origin http://dx.doi.org/10.1136/bjsm.2005.023408
Access rights Closed access
Type Article
Web of Science ID WOS:000237743000008
URI http://repositorio.unifesp.br/handle/11600/28973

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