Affiliations: [a] Sports Medical Center Papendal, Arnhem, The
Netherlands | [b] Department of Neuroscience, University Medical Center
Rotterdam, Rotterdam, The Netherlands | [c] Department of Epidemiology & Biostatistics,
University Medical Center Rotterdam, Rotterdam, The Netherlands | [d] Department of Epidemiology, Maastricht University,
Maastricht, The Netherlands | [e] Department of Movement Sciences, Maastricht
University, Maastricht, The Netherlands
Note: [] Address for correspondence: Robert van Cingel, Sports Medical
Center Papendal, Papendallaan 60, 6816 VD, Arnhem, The Netherlands. Tel.: +31
26 4834440; Fax: +31 26 4834439; E-mail: r.vancingel@smcp.nl
Abstract: Nine male and seven female asymptomatic elite badminton players were
tested bilaterally to determine concentric and eccentric strength values,
conventional ratio and dynamic control ratio of shoulder rotator muscles. All
tests were performed at 60 and 120°/sec. The study
shows significant differences that were similar for men and women: the dominant
arm was stronger than the non-dominant arm, normalised peak torque values at
60°/sec were higher than at 120°/sec, the concentric internal rotator strength
(IRS) was larger than the concentric external rotator strength (ERS) and the
eccentric ERS was larger than the concentric ERS. For females the eccentric ERS
was larger than the concentric IRS as opposed to men in whom the concentric IRS
was larger than the eccentric ERS. For both sexes the CVR for the dominant arm
was significantly higher than for the non-dominant arm. The DCR at
60°/sec was significantly lower than at
120°/sec and the DCR for females was significantly
higher than for men. Data presented are important for interpreting isokinetic
shoulder rotator strength tests in elite badminton players and could be
relevant in rehabilitation and prevention of shoulder injuries.
Keywords: Isokinetics, badminton, shoulder, dynamic control ratio, conventional ratio
